TWI734550B - Methods for generating a multi-port multi-symbol reference signal - Google Patents

Abstract

Various examples and schemes pertaining to reference signals with low power imbalance and low peak-to-average power ratio (PAPR) in mobile communications are described. A processor of an apparatus generates a multi-port multi-symbol reference signal (RS). The processor then controls a transmitter to transmit the multi-port multi-symbol RS through a plurality of antenna ports. In generating the multi-port multi-symbol RS, the processor performs either or both of: (1) modifying a time-domain orthogonal cover code (TD-OCC) pattern for code-division multiplexing (CDM) with respect to the multi-port multi-symbol RS such that time-domain power imbalance is reduced; and (2) performing a permutation on a respective sequence of each CDM group of a plurality of CDM groups with respect to the multi-port multi-symbol RS such that a peak-to-average power ratio (PAPR) is reduced.

Description

Multi-port multi-symbol reference signal generation method

The present invention generally relates to mobile communications, and, more specifically, to reference signals with low power imbalance (low power imbalance) and low peak-to-average power ratio (PAPR) in mobile communications.

Unless otherwise stated, the methods described in this section are not considered as prior art in the scope of the patent application listed later, and are not considered prior art by being included in this section.

獲取該相同CDM組。空間線性預編碼器與OCC模式的聯合效應導致DMRS埠駐留的物理資源區塊（RPB）中某些固定資源元素（RE）位置處的訊號無效。因此，會導致某些正交分頻多工（OFDM）符號中所有RE位置處的訊號無效。此外，版本15中指定的DMRS可具有高PAPR問題，其可透過合併分配至不同CDM組的相同序列（直到相位旋轉）引起該高PAPR問題。因此，需要解決上述問題。 Version 15 (Rel-15) of the 3rd Generation Partnership Project (3GPP) standard for New Radio (NR) notes the problem of power imbalance. Among them, when the spatial linear precoder is applied to the same code division multiplexing When the demodulation reference signal (DMRS) port in the (CDM) group, the imbalance problem appears, among which, through the use of orthogonal cover code (OCC) mode

Obtain the same CDM group. The combined effect of the spatial linear precoder and the OCC mode leads to invalid signals at certain fixed resource element (RE) positions in the physical resource block (RPB) where the DMRS port resides. Therefore, the signals at all RE positions in some Orthogonal Frequency Division Multiplexing (OFDM) symbols will be invalid. In addition, the DMRS specified in version 15 may have a high PAPR problem, which can be caused by combining the same sequence (up to phase rotation) allocated to different CDM groups. Therefore, the above-mentioned problems need to be solved.

The following summary of the invention is only illustrative, and is not intended to be limiting in any way. That is to say, the following summary of the invention is provided to introduce the concepts, main points, benefits, and beneficial effects of the novel and non-obvious technology described herein. Selected embodiments are described further in the detailed description below. Therefore, the following summary is not intended to identify the basic features of the claimed subject matter, nor is it intended to be used to determine the scope of the claimed subject matter.

In one aspect, a method may include the processor of the device generating a multi-port multi-symbol reference signal (RS). The method may also include the processor controlling the transmitter to transmit the multi-port multi-symbol RS through a plurality of antenna ports. In generating the multi-port multi-symbol RS, the method may include the processor modifying the code division multiplexing (CDM) time-domain orthogonal cover code (TD-OCC) mode of the multi-port multi-symbol RS, thereby reducing time The domain power is unbalanced.

In one aspect, a method may include the processor of the device generating a multi-port multi-symbol reference signal (RS). The method may also include the processor controlling the transmitter to transmit the multi-port multi-symbol RS through a plurality of antenna ports. In generating the multi-port multi-symbol RS, the method may include the processor performing permutation on each sequence of each CDM group of the plurality of CDM groups of the multi-port multi-symbol RS, thereby reducing PAPR.

In one aspect, a method may include the processor of the device generating a multi-port multi-symbol reference signal (RS). The method may also include the processor controlling the transmitter to transmit the multi-port multi-symbol RS through a plurality of antenna ports. In generating the multi-port multi-symbol RS, the method may include the processor executing one or two of the following: (1) Modifying the time-domain orthogonality of the code division multiplexing (CDM) of the multi-port multi-symbol RS Covering code (TD-OCC) mode, thereby reducing time-domain power imbalance; and (2) performing permutation on each sequence of each CDM group of the plurality of CDM groups of the multi-port multi-symbol RS, thereby reducing PAPR.

The multi-port multi-symbol reference signal generation method provided by the present invention can generate reference signals with low time domain power imbalance and/or low PAPR.

It is worth noting that although the description provided in this article is related to specific radio access technologies, networks and network topologies such as the fifth generation (5G) and NR, the concepts, solutions proposed and any variations/derivations thereof Can be used in, used in, and implemented through any other types of radio access technologies, networks and network topologies, such as but not limited to, Long-Term Evolution (LTE), LTE-Advanced, LTE-Advanced Upgraded version (LTE-Advanced Pro), Internet-of-Things (IoT), Narrow Band Internet of Things (NB-IoT), and any future development networks and technologies. Therefore, the scope of the present invention is not limited to the examples described herein.

Detailed examples and implementations of the claimed subject matter are disclosed herein. However, it should be understood that the disclosed embodiments and implementations are merely descriptions of the claimed subject matter, which can be implemented in various forms. However, the present invention can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments and implementations set forth herein. On the contrary, these exemplary embodiments and implementations are provided so that the description of the present invention is comprehensive and complete, and will fully convey the scope of the present invention to those with ordinary knowledge in the technical field. In the following description, details of well-known features and technologies may be omitted to avoid unnecessarily obscuring the presented embodiments and implementations. Overview

The embodiments of the present invention relate to various technologies, methods, schemes, and/or solutions regarding reference signals with low power imbalance and low PAPR in mobile communications. According to the present invention, multiple possible solutions are implemented individually or jointly. That is, although these possible solutions are described separately below, two or more of these possible solutions can also be implemented in combination or another manner. It is worth noting that although the description of the present invention can be in the background of DMRS, the same description can also be applied to the Channel State Information Reference Signal (CSI-RS). In other words, the various schemes described in the present invention can be applied to both DMRS and CSI-RS.

Figure 8 is an example scene diagram of the power imbalance of version 15 DMRS. For the power imbalance problem, take the DMRS with four ports and two symbols type 1 as an example. Figure 8 shows the problem when the spatial linear precoder [1,1,1,1] weights all ports, where {a, b, c, d} indicates the fixed RE position spanned by the OCC. When the first symbol has twice the power than the regular data symbol, the second OFDM symbol has zero power. Figure 9 is an example scene diagram of the power imbalance of the DMRS port. As shown in Figure 9, the power imbalance over time reduces the performance of the power amplifier (PA).

For the linear combination of DMRS ports, compared with the uniformly distributed power in the frequency domain, the power of the non-zero RE in the first symbol has four times the power. Considering that DMRS can increase power (up to 3dB for Type 1 and up to 4.77dB for Type 2), there may be a 9dB (for Type 1) power difference between some DMRS REs and data REs. In addition, the regular switching pattern (peaks in each of the other four REs) is displayed in the frequency domain. When considering the nonlinearity of the PA, the uniformly distributed high-power RE mode can cause greater changes in the out-of-band (OOB) spectrum emission.

This problem can be solved by applying a phase shift (possibly random) to each scheduled port and the corresponding data layer. Each scheme can be used for rank 1 transmission of multi-user multiple input and multiple output (MU-MIMO). However, for a higher level of single user MIMO (SU-MIMO), the additional phase on each layer may harm the phase selected from the precoding matrix indicator (PMI), thereby reducing MIMO performance. PMI is exported from CSI-RS and/or sounding reference signal (SRS).

In view of the above, the present invention aims to solve the power imbalance problem through some of the proposed solutions as described below. Figure 1 depicts an example scenario 100 according to an embodiment of the invention. Figure 2 depicts an example scenario 200 according to an embodiment of the invention. With reference to Figures 1 and 2, the following description of the proposed solution for the power imbalance problem is provided.

In a proposed solution according to the present invention, alternatively, the loop shift TD-OCC can be applied along the frequency domain. For example, in the case where the length of the TD-OCC is 2, since the loop-shifted TD-OCC can be easily extended to the case with a larger TD-OCC length (for example, in the CSI-RS), the proposed application The solution can be equivalent to alternatively reverse TD-OCC. Therefore, as shown in Figure 1, {a,b,c,d} and {a',b',c',d'} can alternately appear in the frequency domain. As shown in Figure 1, when there are an even number of PRBs, two DMRS symbols can have the same power.

One advantage of the proposed scheme can be that the power of two symbols can be balanced regardless of the spatial precoding weight. On the other hand, a shortcoming of the proposed scheme may be the regular switching pattern in the frequency domain. As in the case of the four-port DMRS shown in Figure 1, the power distribution in the frequency domain is even more uneven than the original waveform in Figure 8.

。在恒定相移

後，OCC之間的正交性可保持不變。第2圖顯示示例。 In another proposed solution according to the present invention, specific port phase rotation can be applied to the existing OCC. More specifically, the OCC of DMRS port p can be defined as

. At constant phase shift

Later, the orthogonality between OCCs can remain unchanged. Figure 2 shows an example.

可從集合{1,-1,j,-j}中取值。依據3GPP技術標準（TS）38.212，為了確定特定序列

，許多可能DMRS埠組合可為下列表2所示的內容，其中，在3GPP技術標準（TS）38.212中具有所有傳輸天線的可能預編碼權重（例如，TS 38.211的上行鏈路碼書）。 表 1 – DMR 埠組合 埠 數量 埠 組合 2個埠 {0,1}, {4,5}, {0,4} 3個埠 {0,1,4} 4 個埠 {0,1,4,5} In order to simplify the design, the phase

Values can be taken from the set {1,-1,j,-j}. According to 3GPP Technical Standard (TS) 38.212, in order to determine a specific sequence

Many possible DMRS port combinations can be as shown in Table 2 below, where the 3GPP technical standard (TS) 38.212 has the possible precoding weights of all transmission antennas (for example, the uplink codebook of TS 38.211). Table 1-DMR port combinations Number of ports Port combination 2 ports {0,1}, {4,5}, {0,4} 3 ports {0,1,4} 4 ports {0,1,4,5}

候選，當配置四個埠時可發現該候選具有相同功率。 表 2 – 候選相位向量

[1, j, j, -1] [1, j, - j,1] [1, - j, j, 1] [1, - j, - j, 1] List 2 below lists a few

Candidate, when four ports are configured, it can be found that the candidate has the same power. Table 2- Candidate Phase Vector

[1, j , j , -1] [1, j , -j, 1] [1, -j , j , 1] [1, -j , -j , 1]

In addition, the proposed scheme can be combined with the above-mentioned scheme of loop shift TD-OCC to achieve balanced power in time and uniform power in the frequency domain regardless of the precoding weight. Figure 2 shows an example of a combination of two schemes using OCC's specific port phase rotation and loop shift TD-OCC.

表示來自CDM組i的時域訊號，在兩個CDM組訊號相同，但在頻域上相隔d個子載波情況下，

，其中，N為快速傅裡葉變換（FFT）大小。隨著D個CDM組出現，整個時域訊號（假設相同權重）可為：

. For the high PAPR problem, take Type 1 DMRS as an example. When ports 0 and 2 are used at the same time, Figure 10 shows the sequence in the frequency domain.

Indicates the time domain signal from CDM group i. When the two CDM group signals are the same but separated by d subcarriers in the frequency domain,

, Where N is the fast Fourier transform (FFT) size. With the emergence of D CDM groups, the entire time domain signal (assuming the same weight) can be:

.

。可以看出，組合時域訊號的峰值功率是類型1配置的原始單一組的四倍，並且是類型2配置的九倍。 In the type 1 DMRS case (for example, as shown in Figure 10), d is equal to 1 and D is less than or equal to 2. For Type 2 DMRS, d is equal to 2 and D is less than or equal to 3. Figure 11 shows some interesting value pairs (d, D)

. It can be seen that the peak power of the combined time-domain signal is four times that of the original single group of type 1 configuration and nine times of that of type 2 configuration.

In view of the above, the present invention aims to solve the high PAPR problem through various proposed solutions as described below. Figure 3 depicts an example scenario 300 according to an embodiment of the invention. With reference to Figure 3, the following description of the proposed solution for the power imbalance problem is provided.

。在下面描述的各種所提方案中，按照特定方式控制每個CDM組中使用的序列，以避免高PAPR。在下面描述中，

表示基本Gold序列，以及

表示用於CDM組i的頻域序列。這裡，

表示組i的相應時域波形。 Under the various proposed solutions according to the present invention, the general concept is to solve the high PAPR caused by the signals of multiple CDM groups, which can be modified in some ways

. In the various proposed solutions described below, the sequences used in each CDM group are controlled in a specific way to avoid high PAPR. In the description below,

Represents the basic Gold sequence, and

Indicates the frequency domain sequence used for CDM group i. here,

Represents the corresponding time-domain waveform of group i.

應用於CDM組i。例如，

。 In a proposed solution according to the present invention, a specific group sequence shift can be applied or otherwise performed on the corresponding frequency domain sequence of each CDM group. That is, a different Gold sequence is applied to each CDM group. Under the proposed scheme, different sequence offsets can be

Applies to CDM group i. E.g,

.

。第3圖所示的示例將具有梯級

的相位坡道應用於CDM組i，其中，di符合下列表3。值得注意的是，在該所提方案中，時域

是

的迴圈移位與調製版本。 表 3 – 特定組相位坡道參數 CDM 組 i d _i 0 0 1 1 2 3 In another proposed solution according to the present invention, a specific group of phase ramps can be applied or otherwise performed on the corresponding frequency domain sequence of each CDM group. That is, apply a specific set of phase ramps to

. The example shown in figure 3 will have a rung

The phase ramp of is applied to CDM group i, where di meets the following table 3. It is worth noting that in the proposed scheme, the time domain

Yes

Loop shift and modulation version of. Table 3 – Phase ramp parameters for a specific group CDM group i d _i 0 0 1 1 2 3

，可置換序列

。換句話說，

。置換函數的一種選擇可為相反順序，透過該相反順序，也可反轉時域訊號。置換函數的另一種選擇可為一次選擇所有偶數樣本，然後選擇所有奇數樣本，反之亦然。 In another proposed solution according to the present invention, specific group sequence permutation can be applied to or performed in other ways on the corresponding frequency domain sequence of each CDM group. That is, according to the specific group replacement function

, Replaceable sequence

. in other words,

. One option of the permutation function can be the reverse order, through which the time-domain signal can also be reversed. Another option for the permutation function can be to select all the even-numbered samples at once, and then select all the odd-numbered samples, and vice versa.

In another proposed solution according to the present invention, the corresponding sequence of each CDM group can be initialized to have a specific group initial seed, wherein the specific group initial seed is related to the corresponding CDM group index. A detailed description related to the proposed solution is provided below.

In order to avoid high PAPR, the working assumption for DMRS of type 1 is to use the two c _inits in version 15 (configured by n _SCID = 0,1) respectively for the ports of each of the two groups. Here, c _init (n _SCID = k) represents the value _{of c init} in the TS 38.211 formula _{when n SCID is set to k.} It is worth noting that n _{SCID is} used for other purposes. For example, _{one use scenario of n SCID} is to support dynamic point selection (DPS). Therefore, replace the CDM group k with _{the fixed scheme of c init} (n _SCID = k), k = 0,1, and switch the parameter n _SCID in the formula according to the DCI column shown in Table 4 below. DCI is a bit "DMRS sequence initialization" field in DCI format 0_1/1_1. Table 4- Setting of c _init for CDM group and DCI CDM group DCI = 0 DCI = 1 0 c _init (n _SCID = 0) c _init (n _SCID = 1) 1 c _init (n _SCID = 1) c _init (n _SCID = 0)

In this way, user equipment (UE) based on Release 16 (Rel-16) of the 3GPP standard can use different c _init for each CDM group, thereby achieving low PAPR. In addition, assuming that the port is located in a CDM group, UEs based on version 15 can be co-scheduled in any CDM group _{through the appropriate setting of n SCID (DCI control).}

For the DMRS of Loop First Code OFDM (CP-OFDM) Type 2, there are three kinds of CDM groups, and therefore _{the scheme based on one bit n SCID} cannot work. In order to propose the _{value of the subordinate group c init} , the following factors can be considered: the compatibility of the old version and the cross-correlation performance. For compatibility with the old version, when co-scheduling Release 15 UEs and Release 16 UEs in a multi-user (MU) scenario in the same CDM group, orthogonality is maintained between DMRS ports. In addition, the maximum number of CDM groups can be co-scheduled with Release 15 UEs. For cross-correlation performance, modified c _init can have similar (partial) cross-correlation performance as version 15. The compatibility of the old version can greatly reduce the possible forms of the new formula. Therefore, the version 15 c _init formula should be extended in a way, where, in this way, version 15 c _init is a special case when some parameters are fixed as constants.

. In view of the above, the possible methods can be expressed mathematically as follows:

.

與

分別表示版本15與版本16的序列初始化。此外，

是用於相關埠 p的CDM組索引的兩位元值，並且處於類型1的{0,1}以及處於類型2的{0,1,2}。另外，運算子

是按位XOR，並且x[ i: j]表示從位置i到位置j的位元，其中，索引0是最低有效位元（LSB）。可以檢查的是，對於CDM組0與組1，假設那些UE使用一個CDM組內的埠，則可透過為版本15 UE適當設置n _SCID來獲得

。此外，這與表4一致，因此可以按照統一方式陳述這兩種類型。簡言之，在該提出方案下，對於物理下行鏈路共用通道（PDSCH）與物理上行鏈路共用通道（PUSCH），可基於針對兩種類型1 DMRS與類型2 DMRS的CDM組索引，推導c _init的數值。 說明性實施方式 here,

and

Indicates the sequence initialization of version 15 and version 16, respectively. also,

Is the two-bit value of the CDM group index for the relevant port p , and is {0,1} in type 1 and {0,1,2} in type 2. In addition, the operator

It is a bitwise XOR, and x[ i : j ] represents the bit from position i to position j, where index 0 is the least significant bit (LSB). What can be checked is that for CDM group 0 and group 1, assuming that those UEs use a port in the CDM group, they can be obtained by appropriately setting n _{SCID for Release 15 UEs}

. In addition, this is consistent with Table 4, so the two types can be stated in a unified manner. In short, under the proposed scheme, for the physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH), c can be derived based on the CDM group index for two types 1 DMRS and type 2 DMRS The value of _init. Illustrative embodiment

FIG. 4 shows an example communication environment 400 with an example device 410 and an example device 420 according to an embodiment of the present invention. Each of the device 410 and the device 420 can perform various functions to implement solutions, technologies, procedures, and methods for reference signals with low power imbalance and low PAPR in mobile communications, including the various above-mentioned methods described in the following procedures.述plans.

Each of the device 410 and the device 420 may be a part of an electronic device, and may be a UE such as a portable or mobile device, a wearable device, a wireless communication device, or a computing device. For example, each of the device 410 and the device 420 may be implemented in a smart phone, a smart watch, a personal digital assistant, a digital camera, or a computing device such as a tablet computer, a laptop computer, or a notebook computer. Each of the device 410 and the device 420 may also be a part of a machine type device, and may be an IoT or NB-IoT device such as a fixed or static device, a household device, a wired communication device, or a computing device. For example, each of the device 410 and the device 420 may be implemented in a smart thermostat, a smart refrigerator, a smart door lock, a wireless speaker, or a home control center.

In some embodiments, each of the device 410 and the device 420 may also be implemented in the form of one or more integrated circuit (IC) chips, for example, but not limited to, one or more single-core processors, one Or multiple multi-core processors, or one or multiple Complex-Instruction-Set-Computing (CISC) processors. Each of the device 410 and the device 420 includes at least a part of the elements shown in FIG. 4, for example, a processor 412 and a processor 422, respectively. Each of the device 410 and the device 420 may further include one or more other components (for example, internal power supply, display device, and/or user peripheral equipment) that are not related to the solution proposed by the present invention. However, for simplicity and conciseness, the device These other components of 410 and device 420 are not described in Figure 4, nor are they described below.

In many embodiments, at least one of the device 410 and the device 420 may be a part of an electronic device, and may be a network node or base station (for example, eNB, gNB, TRP), small community, router, or gateway. For example, at least one of the device 410 and the device 420 may be implemented as an eNodeB of an LTE, LTE-Advanced, or LTE-Advanced Pro network, or a 5G, NR, IoT, or NB-IoT network. GNB of the road. Alternatively, at least one of the device 410 and the device 420 may be implemented in the form of one or more IC chips, for example, but not limited to, one or more single-core processors, one or more multi-core processors, or one or more CISCs processor.

In one aspect, each of the processor 412 and the processor 422 may be implemented in the form of one or more single-core processors, one or more multi-core processors, or one or more CISC processors. That is to say, even though the singular term "processor" is used herein to refer to the processor 412 and the processor 422, according to the present invention, each of the processor 412 and the processor 422 may include a plurality of processes in some embodiments. In other embodiments, a single processor may be included. On the other hand, each of the processor 412 and the processor 422 may be implemented in the form of hardware (and, optionally, firmware) with electronic components, which may include, for example, but not limited to, implementation basis One or more transistors, one or more diodes, one or more capacitors, one or more resistors, one or more inductances, one or more memristors configured and arranged for the specific purpose of the present invention And/or one or more varactors. In other words, according to the various embodiments of the present invention, at least in some embodiments, each of the processor 412 and the processor 422 can be used as a dedicated machine specially designed, configured, and arranged in accordance with various implementations of the present invention. The example performs specific tasks including reference signals with low power imbalance and low PAPR in mobile communications.

In some embodiments, the device 410 may further include a transceiver 416 coupled to the processor 412 as a communication device, and the transceiver 416 can perform wireless transmission and reception of data for MU-MIMO and SU-MIMO. In some embodiments, the device 410 may further include a memory 414 coupled to the processor 412, and can be accessed by the processor 412 and store data therein. In some embodiments, the device 420 may also include a transceiver 426 coupled to the processor 422 as a communication device, and the transceiver 426 can perform wireless transmission and reception of data for MU-MIMO and SU-MIMO. In some embodiments, the device 420 may further include a memory 424 coupled to the processor 422, and can be accessed by the processor 422 and store data therein. Therefore, the device 410 and the device 420 can wirelessly communicate with each other through the transceiver 416 and the transceiver 426, respectively.

To help better understand, in the context of the NR communication environment, the following descriptions of the operations, functions, and capabilities of each of the device 410 and the device 420 are provided, in which the device 410 is implemented or implemented as a wireless communication device, a communication device, or a UE , And the device 420 is implemented into or implemented as a base station (for example, eNB, gNB, or TRP) connected or communicatively coupled to a wireless network (for example, 5G/NR mobile network).

In one aspect of handling reference signals with low power imbalance and low PAPR in mobile communications according to the present invention, the processor 412 of the device 410 (as a UE) can generate a multi-port multi-symbol RS. For example, the processor 412 may perform one or both of the following: (1) modify the time-domain orthogonal cover code (TD-OCC) mode of CDM for multi-port and multi-symbol RS, thereby reducing the time-domain power imbalance, and (2) ) Perform permutation on each sequence of each CDM group of the multiple CDM groups of the multi-port multi-symbol RS, thereby reducing PAPR. In addition, the processor 412 can control the transmitter of the transceiver 416 to transmit a multi-port multi-symbol RS to the device 420 through a plurality of antenna ports.

In many embodiments, in the modified TD-OCC mode, the processor 412 may perform a loop shift in the TD-OCC mode. Alternatively, in the modified TD-OCC mode, the processor 412 can perform a specific port phase rotation of the TD-OCC mode. Still alternatively, in the modified TD-OCC mode, the processor 412 can perform both the specific port phase rotation and the loop shift of the TD-OCC mode.

In many embodiments, when performing the permutation of the individual sequences of each CDM group, the processor 412 may apply a specific group sequence shift to the individual frequency domain sequences of each CDM group. Alternatively, when performing permutation of each sequence of each CDM group, the processor 412 may apply a specific group phase ramp to each frequency domain sequence of each CDM group. Alternatively, when performing permutation of each sequence of each CDM group, the processor 412 may apply a specific group sequence permutation to each frequency domain sequence of each CDM group. Still alternatively, when performing the permutation of each sequence of each CDM group, the processor 412 may initialize each sequence of each CDM group with a specific group initial seed. For example, for each CDM group, the initial seed of the specific group may be related to each CDM group index.

In many embodiments, the multi-port multi-symbol RS may include DMRS. Alternatively, the multi-port multi-symbol RS may include CSI-RS.

In another aspect of processing reference signals with low power imbalance and low PAPR in mobile communications according to the present invention, the processor 422 of the device 420 (as a base station) can generate a multi-port multi-symbol RS. For example, the processor 422 can perform one or both of the following: (1) modify the TD-OCC mode of CDM for multi-port multi-symbol RS, thereby reducing the time domain power imbalance, and (2) in the multi-port multi-symbol RS Permutation is performed on each sequence of each CDM group of the plurality of CDM groups, thereby reducing PAPR. In addition, the processor 422 can control the transmitter of the transceiver 426 to transmit a multi-port multi-symbol RS to the device 410 through a plurality of antenna ports.

In many embodiments, in the modified TD-OCC mode, the processor 422 may perform a loop shift in the TD-OCC mode. Alternatively, in the modified TD-OCC mode, the processor 422 can perform a specific port phase rotation of the TD-OCC mode. Still alternatively, in the modified TD-OCC mode, the processor 422 can perform both the specific port phase rotation and the loop shift of the TD-OCC mode.

In many embodiments, when performing the permutation of the individual sequences of each CDM group, the processor 422 may apply a specific group sequence shift to the individual frequency domain sequences of each CDM group. Alternatively, when performing permutation of each sequence of each CDM group, the processor 422 may apply a specific group phase ramp to each frequency domain sequence of each CDM group. Alternatively, when performing permutation of each sequence of each CDM group, the processor 422 may apply a specific group sequence permutation to each frequency domain sequence of each CDM group. Still alternatively, when performing the permutation of each sequence of each CDM group, the processor 422 may initialize each sequence of each CDM group with a specific group initial seed. For example, for each CDM group, the initial seed of the specific group may be related to each CDM group index.

In many embodiments, the multi-port multi-symbol RS may include DMRS. Alternatively, the multi-port multi-symbol RS may include CSI-RS. Illustrative process

Figure 5 is an example process 500 according to an embodiment of the present invention. The process 500 may be an illustrative embodiment of the proposed solution for reference signals with low power imbalance and low PAPR in mobile communications according to the present invention. The process 500 may represent the feature implementation aspect of the device 410 and the device 420. The process 500 may include one or more operations, actions, or functions shown by one or more of the blocks 510 and 520. Although the blocks shown are discrete, depending on the desired implementation, the blocks in the process 500 can be split into more blocks, combined into fewer blocks, or some blocks are deleted. In addition, the blocks of the process 500 may be executed sequentially as shown in FIG. 5, or, alternatively, may be executed in a different order. The process 500 can also be partially or wholly repeated. The device 410, the device 420, and/or any suitable wireless communication device, UE, base station, or machine type device may implement the process 500. For illustrative purposes only and without limiting the scope, the process 500 is described below in the context of the device 410 as a UE and the device 420 as a base station of a wireless network (for example, a 5G/NR mobile network). The process 500 may start at block 510.

At block 510, the process 500 may include the processor 412 of the device 410 acting as the UE to generate a multi-port multi-symbol reference signal (RS). For example, the process 500 may include the processor 412 to modify the time-domain orthogonal cover code (TD-OCC) mode of the CDM of the multi-port multi-symbol RS, thereby reducing the time-domain power imbalance. The process 500 can proceed from block 510 to block 520.

At block 520, the process 500 may include the processor 412 controlling the transmitter of the transceiver 416 to transmit a multi-port multi-symbol RS to the device 420 through a plurality of antenna ports.

In many embodiments, in modifying the TD-OCC mode, the process 500 may include the processor 412 executing a loop shift in the TD-OCC mode. Alternatively, in modifying the TD-OCC mode, the process 500 may include the processor 412 executing a specific port phase rotation in the TD-OCC mode. Still alternatively, in the modified TD-OCC mode, the process 500 may include the processor 412 executing both the specific port phase rotation and the loop shift in the TD-OCC mode.

In many embodiments, the multi-port multi-symbol RS may include DMRS. Alternatively, the multi-port multi-symbol RS may include CSI-RS.

Fig. 6 is an example process 600 according to an embodiment of the present invention. The process 600 may be an illustrative embodiment of the proposed solution for reference signals with low power imbalance and low PAPR in mobile communications according to the present invention. The process 600 may represent the feature implementation aspect of the device 410 and the device 420. The process 600 may include one or more operations, actions, or functions shown by one or more of the blocks 610 and 620. Although the blocks shown are discrete, depending on the desired implementation, the blocks in the process 600 can be split into more blocks, combined into fewer blocks, or some blocks are deleted. In addition, the blocks of the process 600 may be executed sequentially as shown in FIG. 6, or, alternatively, may be executed in a different order. The process 600 can also be partially or wholly repeated. The device 410, the device 420, and/or any suitable wireless communication device, UE, base station, or machine type device may implement the process 600. For illustrative purposes only and without limiting the scope, the process 600 is described below in the context of the device 410 as a UE and the device 420 as a base station of a wireless network (for example, a 5G/NR mobile network). The process 600 may start at block 610.

At block 610, the process 600 may include the processor 412 of the device 410 acting as the UE to generate a multi-port multi-symbol reference signal (RS). For example, the process 600 may include the processor 412 to perform permutation on each sequence of each of the multiple CDM groups of the multi-port multi-symbol RS, thereby reducing PAPR. The process 600 can proceed from block 610 to block 620.

At block 620, the process 600 may include the processor 412 controlling the transmitter of the transceiver 416 to transmit a multi-port multi-symbol RS to the device 420 through a plurality of antenna ports.

In many embodiments, when performing the permutation of each sequence of each CDM group, the process 600 may include the processor 412 applying a specific group sequence shift to each frequency domain sequence of each CDM group. Alternatively, when performing the permutation of each sequence of each CDM group, the process 600 may include the processor 412 applying a specific group phase ramp to each frequency domain sequence of each CDM group. Alternatively, when performing permutation of each sequence of each CDM group, the process 600 may include the processor 412 applying a specific group sequence permutation to each frequency domain sequence of each CDM group. Still alternatively, when performing the replacement of each sequence of each CDM group, the process 600 may include the processor 412 initializing each sequence of each CDM group with a specific group initial seed. For example, for each CDM group, the initial seed of the specific group may be related to each CDM group index.

In many embodiments, the multi-port multi-symbol RS may include DMRS. Alternatively, the multi-port multi-symbol RS may include CSI-RS.

Figure 7 is an example process 700 according to an embodiment of the present invention. The process 700 may be an illustrative embodiment of the proposed solution for reference signals with low power imbalance and low PAPR in mobile communications according to the present invention. The process 700 may represent the feature implementation aspect of the device 410 and the device 420. The process 700 may include one or more operations, actions, or functions shown by one or more of the blocks 710 and 720. Although the blocks shown are discrete, depending on the desired implementation, the blocks in the process 700 can be split into more blocks, combined into fewer blocks, or some blocks are deleted. In addition, the blocks of the process 700 may be executed sequentially as shown in FIG. 7, or, alternatively, may be executed in a different order. The process 700 can also be partially or wholly repeated. The device 410, the device 420, and/or any suitable wireless communication device, UE, base station, or machine type device may implement the process 700. For illustrative purposes only and without limiting the scope, the process 700 is described below in the context of the device 410 as a UE and the device 420 as a base station of a wireless network (for example, a 5G/NR mobile network). The process 700 may start at block 710.

At block 710, the process 700 may include the processor 412 of the device 410 acting as the UE to generate a multi-port multi-symbol RS. For example, the process 700 may include the processor 412 to execute one or two of the following: (1) modify the TD-OCC mode of the CDM of the multi-port multi-symbol RS to reduce the time-domain power imbalance, and (2) in the multi-port multi-symbol RS Permutation is performed on each sequence of each CDM group of a plurality of CDM groups of the multi-symbol RS, thereby reducing PAPR. The process 700 may proceed from block 710 to block 720.

At block 720, the process 700 may include the processor 412 controlling the transmitter of the transceiver 416 to transmit a multi-port multi-symbol RS to the device 420 through a plurality of antenna ports.

In many embodiments, in modifying the TD-OCC mode, the process 700 may include the processor 412 executing a loop shift in the TD-OCC mode. Alternatively, in modifying the TD-OCC mode, the process 700 may include the processor 412 executing a specific port phase rotation in the TD-OCC mode. Still alternatively, in the modified TD-OCC mode, the process 700 may include the processor 412 executing both the specific port phase rotation and the loop shift in the TD-OCC mode.

In many embodiments, when performing the permutation of each sequence of each CDM group, the process 700 may include the processor 412 applying a specific group sequence shift to each frequency domain sequence of each CDM group. Alternatively, when performing the permutation of each sequence of each CDM group, the process 700 may include the processor 412 applying a specific group phase ramp to each frequency domain sequence of each CDM group. Alternatively, when performing permutation of each sequence of each CDM group, the process 700 may include the processor 412 applying a specific group sequence permutation to each frequency domain sequence of each CDM group. Still alternatively, when performing the replacement of each sequence of each CDM group, the process 700 may include the processor 412 initializing each sequence of each CDM group with a specific group initial seed. For example, for each CDM group, the initial seed of the specific group may be related to each CDM group index.

In many embodiments, the multi-port multi-symbol RS may include DMRS. Alternatively, the multi-port multi-symbol RS may include CSI-RS. Additional information

The subject matter described herein sometimes shows different components contained within or connected to different other components. However, it should be understood that the described architectures are only examples, and in fact many other architectures that achieve the same function can be implemented. In a conceptual sense, any arrangement of components that achieve the same function is effectively "associated" so that the desired function can be realized. Therefore, regardless of architecture or intermediate components, any two components combined to achieve a specific function in this article can be regarded as "associated" with each other, so that the desired function can be realized. Similarly, any two components so related can also be regarded as "operationally connected" or "operationally coupled" to each other to achieve the desired function, and any two components that can be so related can also be viewed To "operately connect" each other to achieve the desired function. Specific examples that can be coupled in operation include, but are not limited to, components that can be physically matched and/or physically interacting and/or components that can be interacted wirelessly and/or wirelessly and/or logically interacting and/or Logically interactable components.

Furthermore, with regard to any plural and/or singular terms used herein, persons with ordinary knowledge in the relevant technical field can convert the plural to the singular and/or from the singular to the plural at appropriate time according to the context and/or application. For the sake of clarity, various singular/plural reciprocities can be clearly stated in this article.

In addition, those with ordinary knowledge in the technical field will understand that, generally, the terms used in this document, and especially those used in the scope of the attached patent application (for example, the subject of the scope of the attached patent application), generally mean "Open-ended" terms, for example, the term "includes" should be interpreted as "includes but not limited to", the term "has" should be interpreted as "at least has", and the term "includes" should be interpreted as "includes but is not limited to", and many more. Those with ordinary knowledge in the technical field will also understand that if the specific number listed in the scope of the patent application is intentional, the intention will be clearly listed in the scope of the patent application, and there is no such thing in the absence of such enumeration. Kind of intent. For example, in order to aid understanding, the scope of the attached patent application may include the use of the introductory phrases "at least one" and "one or more." However, the use of this phrase should not be construed as implying that the enumeration of the scope of patent application through the introduction of the indefinite article "a" or "one" limits the scope of any particular application including such an enumeration of the introduced patent application scope to only Include an implementation of this enumeration, even when the same patent application includes the introductory phrases "one or more" or "at least one" and indefinite articles such as "one" or "one", for example, "one and “/Or one” should be interpreted as meaning “at least one” or “one or more”, and this also applies to the use of definite articles used to introduce the enumerated patent scope. In addition, even if a specific number of the introduced patent scope enumeration is explicitly listed, those with ordinary knowledge in the technical field will recognize that such enumeration should be interpreted as meaning at least the enumerated number, for example, if there is no In the case of other modifiers, an unobstructed list of "two lists" means at least two lists or two or more lists. In addition, in the case of using a convention similar to "at least one of A, B, C, etc.", in the sense that a person with ordinary knowledge in the technical field will understand this convention, it usually means such an interpretation (for example, " A system having at least one of A, B, and C" will include, but is not limited to, having A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or Together with the systems of A, B, and C). In the case of using a convention similar to "at least one of A, B, C, etc.", in the sense that a person with ordinary knowledge in the technical field will understand this convention, it usually means such an interpretation (for example, "has A "System with at least one of, B, or C" shall include, but is not limited to, having A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C, etc.). Those with ordinary knowledge in the technical field will also understand that, whether in the description, the scope of the patent application or the drawings, any transition words and/or phrases that actually represent two or more alternatives should be understood as Consider the possibility of including one of these items, any one of these items, or both. For example, the phrase "A or B" will be understood to include the possibility of "A" or "B" or "A and B".

From the above, it can be understood that various embodiments of the present invention have been described herein for illustrative purposes, and various modifications can be made without departing from the scope and spirit of the present invention. Therefore, the various embodiments disclosed herein are not meant to be restrictive, and the true scope and spirit are determined by the scope of the attached patent application.

100: Network scene 200, 300: sample scenario 400: Communication environment 410, 420: Device 416, 426: Transceiver 412, 422: Processor 414, 424: memory 500, 600, 700: Process 510, 520, 610, 620, 710, 720: block

的圖。 The included drawings are used to provide a further understanding of the invention, and are incorporated into and constitute a part of the invention. The drawings illustrate the embodiments of the invention, and together with the description serve to explain the principle of the invention. It can be understood that, in order to clearly illustrate the concept of the present invention, the drawings are not necessarily drawn to scale, and some of the components shown may be shown in proportions that exceed the dimensions in the actual implementation. Figure 1 is an example scene diagram according to an embodiment of the present invention. Figure 2 is an example scene diagram according to an embodiment of the present invention. Figure 3 is an example scene diagram according to an embodiment of the present invention. Figure 4 is a block diagram of an exemplary communication environment according to an embodiment of the present invention. Figure 5 is a flowchart of an example process according to an embodiment of the present invention. Figure 6 is a flowchart of an example process according to an embodiment of the present invention. Figure 7 is a flowchart of an example process according to an embodiment of the present invention. Figure 8 is an example scene diagram of the power imbalance of version 15 DMRS. Figure 9 is an example scene diagram of the power imbalance of the DMRS port. Figure 10 is an example scene diagram in the frequency domain with high PAPR. Figure 11 shows some value pairs (d, D) with high PAPR

Figure.

500: Process 510, 520: block

Claims (10)

A method for generating a multi-port multi-symbol reference signal includes: generating a multi-port multi-symbol reference signal (RS) through a processor of a device; and controlling a transmitter to transmit the multi-port through a plurality of antenna ports through the processor Multi-symbol RS; wherein the step of generating the multi-port multi-symbol RS includes modifying the code division multiplexing of the multi-port multi-symbol RS by alternatively applying a time-domain orthogonal cover code (TD-OCC) pattern along the frequency domain (CDM) The time domain orthogonal cover code (TD-OCC) mode, thereby reducing the time domain power imbalance. The method according to claim 1, wherein the step of modifying the TD-OCC mode includes performing a loop shift of the TD-OCC mode, performing a specific port phase rotation of the TD-OCC mode, or performing the TD-OCC Both phase rotation and loop shift of the specific port of the mode. The method according to claim 1, wherein the multi-port multi-symbol RS includes a demodulation reference signal (DMRS) and/or a channel state information reference signal (CSI-RS). A method for generating a multi-port multi-symbol reference signal includes: generating a multi-port multi-symbol reference signal (RS) through a processor of a device; and controlling a transmitter to transmit the multi-port through a plurality of antenna ports through the processor Multi-symbol RS; wherein the step of generating the multi-port multi-symbol RS includes performing permutation on each sequence of each CDM group of a plurality of code division multiplexing (CDM) groups of the multi-port multi-symbol RS to invert Time-frequency signal, thereby reducing the peak-to-average power ratio (PAPR). The method according to claim 4, wherein the step of performing the permutation on the respective sequences of each CDM group includes applying a specific group sequence shift to each frequency domain sequence of each CDM group, and applying a specific group phase The ramp is applied to each frequency domain sequence of each CDM group, a specific group sequence replacement is applied to each frequency domain sequence of each CDM group, or the specific group initial seed is used to initialize each sequence of each CDM group. The method according to claim 5, wherein, for each CDM group, the specific group is initially The initial seed is related to each CDM group index. The method according to claim 4, wherein the multi-port multi-symbol RS includes a demodulation reference signal (DMRS) and/or a channel state information reference signal (CSI-RS). A method for generating a multi-port multi-symbol reference signal includes: generating a multi-port multi-symbol reference signal (RS) through a processor of a device; and controlling a transmitter to transmit the multi-port through a plurality of antenna ports through the processor Multi-symbol RS; wherein the step of generating the multi-port multi-symbol RS includes one or two of the following: by alternatively applying a time-domain orthogonal cover code (TD-OCC) pattern along the frequency domain to modify the multi-port The time-domain orthogonal cover code (TD-OCC) mode of the multi-symbol RS code division multiplexing (CDM), thereby reducing the time-domain power imbalance; Perform permutation on each sequence of a CDM group to invert the time-frequency signal, thereby reducing the peak-to-average power ratio (PAPR). The method according to claim 8, wherein the step of modifying the TD-OCC mode includes one of the following: performing a loop shift of the TD-OCC mode; performing a specific port phase rotation of the TD-OCC mode; And perform both the phase rotation of the specific port and the loop shift of the TD-OCC mode. The method according to claim 8, wherein the step of performing the permutation on each sequence of each CDM group includes one of the following: applying a specific group sequence shift to each frequency domain sequence of each CDM group ; Apply a specific group phase ramp to each frequency domain sequence of each CDM group; apply specific group sequence permutation to each frequency domain sequence of each CDM group; and initialize each sequence of each CDM group with a specific group initial seed .

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