CN102244558B - Data transmission method and device - Google Patents

Abstract

Embodiments of the present invention provide a method and device for sending data. The effective information symbols of a transmission unit whose transmission time is T can be divided into N sub-transmission units, and the total transmission time of N sub-transmission units is T, by adjusting the number of training sequence symbols in each sub-transmission unit and the cycle The prefix symbol can achieve the purpose of improving the processing performance of the PCE scheme.

Description

Method and device for sending data

technical field

The invention relates to the technical field of communication, in particular to a method and a device for sending data.

Background technique

The evolution process of the packet radio service of the Global System for Mobile Communications/Global System for Mobile Communications Enhanced Data Rate Evolution Radio Access Network (GSM/GERAN: Global System for Mobile Communications/GSM EDGE RadioAccess Network) system is the general packet radio service technology (GPRS: General Packet Radio Service), enhanced general packet radio service (EGPRS: Enhanced GPRS), enhanced general packet radio service phase two (EGPRS2: Enhanced GPRSPhase2). The performance improvement of the packet data service is mainly the improvement of the data throughput. Among them, the physical layer of GPRS is still modulated by Gaussian Filtered Minimum Shift Keying (GMSK: Gaussian Filtered Minimum Shift Keying) in GSM, and the channel coding adopts CS1~CS4. Shift keying (8PSK: 8Phase Shift Keying) modulation, channel coding adopts MCS1~MCS4 (corresponding to GMSK modulation) and MCS5~MCS9 (corresponding to 8PSK modulation). The further evolution of EGPRS2 introduces higher order modulation and new coding methods. The technical evolution of EGPRS2 is more complicated, and it is divided into two stages: EGPRS2-A and EGPRS2-B. EGPRS2-A introduces higher-order modulation (16QAM and 32QAM) and new coding methods (DAS5~DAS12 and UAS7~UAS11), and EGPRS2-B introduces new modulation (QPSK, 16QAM and 32QAM) and coding (DBS5~ DBS12 and UBS5 ~ UBS12) In addition to introducing a high symbol rate.

At present, an existing EGPRS2 improvement technology is (PCE: Pre-coded EGPRS2, EGPRS2 precoding) scheme, by introducing inverse discrete Fourier transform (IDFT: Inverse DiscreteFourier Transform) at the modulation end, and introducing discrete Fourier transform at the receiving end The leaf transform (DFT: Discrete FourierTransform) operation converts EGPRS2 time-domain signal processing to frequency-domain signal processing, thereby effectively reducing the complexity of the receiver, and at the same time achieving better throughput performance and combating TX/RX Impairments (transmitting/receiving defects )Ability.

In the research on the prior art, the inventor found that: in the existing PCE scheme, the transmitting end adopts a burst (pulse) with a fixed time T in the current GERAN system as a transmitting unit, and its normal symbol rate (NSR: Normal The structure diagram of the pulse under Symbol Rate) is shown in Figure 1. The sending unit includes 116 effective information symbols (D1,...,D116) and 26 training sequence symbols (TS1,...,TS26), where the effective information is Refers to the information to be sent after user data is channel-coded; and at the head of the sending unit is a cyclic prefix (CP: Cyclic Prefix) symbol, and the other end is a guard period (GP: Guard Period). Figure 2 shows the distribution of subcarriers in the existing PCE transmission scheme. Since the subcarrier spacing is small, only 1.9kHZ, the existing PCE scheme is sensitive to frequency errors, that is, the robustness of frequency errors is poor.

Contents of the invention

Embodiments of the present invention provide a method and a device for sending data.

A method for sending data, comprising: dividing X1 effective information symbols in a sending unit with a sending time of T into N sub-sending units and inserting training sequence symbols into each sub-sending unit, the N sub-sending units The sum of the number of valid information symbols in the N is less than or equal to X1, the sum of the number of training sequence symbols in the N sub-transmission units Y2 is less than the number Y1 of the number of training sequence symbols in the one transmission unit; for the N Each sub-transmission unit in the sub-transmission units sequentially performs symbol mapping, inverse discrete Fourier transform and adding cyclic prefix operations; adding P guard time interval symbols to the back end of the last sub-transmission unit of the N sub-transmission units; Perform pulse shaping on the N sub-transmission units after the guard interval is added; transmit the pulse-shaped information of each sub-transmission unit in the N sub-transmission units, and the total transmission time of the N sub-transmission units is T; where , a transmission unit with a transmission time of T contains X1 effective information symbols, Y1 training sequence symbols, Z1 cyclic prefix symbols and P guard time symbols, and the total number of symbols contained in the N sub-transmission units It is equal to the total number of symbols included in the one sending unit, and the X1, Y1, Z1, P, Y2 and N are integers.

A processor, comprising: an allocation unit, configured to divide X1 effective information symbols in a transmission unit whose transmission time is T into N sub-transmission units and insert training sequence symbols into each sub-transmission unit, the N The sum of the number of effective information symbols in the sub-transmission units is less than or equal to X1, and the sum of the numbers of training sequence symbols in the N sub-transmission units Y2 is less than the number of training sequence symbols in the one transmission unit Y1; A mapping unit, configured to perform symbol mapping on the symbols in each of the N sub-sending units; a discrete Fourier transform unit, configured to perform symbol mapping on the symbols in each of the N sub-sending units Inverse discrete Fourier transform; a cyclic prefix processing unit, configured to add a cyclic prefix symbol to the front end of each sub-transmitting unit in the N sub-transmitting units; a guard time processing unit, configured to add a cyclic prefix symbol to the front end of each of the N sub-transmitting units P guard time interval symbols are added to the back end of the sub-transmission unit; a transmission pulse shaping unit is used to perform transmission pulse shaping on each sub-transmission unit in the N sub-transmission units; a transmission unit is used to send the N sub-transmission units Each sub-transmission unit pulse-shaped information in the unit, the total transmission time T of the N sub-transmission units; wherein, one transmission unit with the transmission time T contains X1 valid information symbols and Y1 training sequences symbol, Z1 cyclic prefix symbols, and P guard time interval symbols, the total number of symbols contained in the N sub-transmission units is equal to the total number of symbols contained in the one transmission unit, and the X1, Y1, Z1 , P, Y2 and N are integers.

A device for sending data, characterized in that the device for sending data includes:

An allocation unit for dividing X1 effective information symbols in a transmission unit with a transmission time of T into N sub-transmission units and inserting training sequence symbols into each sub-transmission unit, where the effective information symbols in the N sub-transmission units The sum of the numbers is less than or equal to X1, and the sum Y2 of the numbers of the training sequence symbols in the N sub-transmission units is less than the number Y1 of the training sequence symbols in the one sending unit;

a mapping unit for performing symbol mapping on symbols in each of the N sub-transmission units;

an inverse discrete Fourier transform unit for performing inverse discrete Fourier transform on symbols in each of the N sub-transmitting units;

A cyclic prefix processing unit for adding a cyclic prefix symbol to the front end of each of the N sub-transmission units;

A guard time processing unit for adding P guard time interval symbols to the rear end of the last sub-send unit of the N sub-send units;

a transmission pulse shaping unit for performing transmission pulse shaping on each of the N sub-transmission units;

A sending unit for sending the pulse-shaped information of each of the N sub-sending units, the total sending time T of the N sub-sending units;

Wherein, a sending unit with a sending time of T includes X1 effective information symbols, Y1 training sequence symbols, Z1 cyclic prefix symbols and P guard time interval symbols, and the total number of symbols contained in the N sub-transmitting units The number is equal to the total number of symbols contained in the one sending unit, and the X1, Y1, Z1, P, Y2, and N are integers; the allocation unit is further used to divide all the Y2 training sequence symbols to one of the N sub-sending units; dividing the X1 valid information symbols to be sent into the N sub-sending units.

Through the above embodiments of the present invention, the processing performance of the PCE scheme can be improved.

Description of drawings

Figure 1 shows a block diagram of a sending unit.

Fig. 2 shows a distribution diagram of sub-carriers in a multi-carrier system.

Fig. 3 shows a schematic diagram of a communication system in an embodiment of the present invention by way of example.

Fig. 4 shows a schematic diagram of a method for sending data in an embodiment of the present invention by way of example.

Fig. 5 shows a schematic diagram of dividing valid information symbols into two sub-sending units in an embodiment of the present invention by way of example.

Fig. 6a shows a schematic diagram of dividing effective information symbols into two sub-transmission units in another embodiment of the present invention by way of example.

Fig. 6b shows, by way of example, a schematic diagram of dividing valid information symbols into two sub-sending units in yet another embodiment of the present invention.

Fig. 7a shows, by way of example, a schematic diagram of two sub-sending units processed by increasing guard time in an embodiment of the present invention.

Fig. 7b shows, by way of example, another schematic diagram of two sub-sending units processed by adding guard time in another embodiment of the present invention.

Fig. 8 shows a distribution diagram of sub-carriers in a multi-carrier system in an embodiment of the present invention by way of example.

Fig. 9 shows, by way of example, a unit schematic diagram of a device in an embodiment of the present invention.

Detailed ways

Fig. 3 shows a communication system 100 in an embodiment of the present invention by way of example. The communication system 100 includes at least one sending end 110 and one or more receiving ends 120 performing data communication with the sending end 110 . For example, communication system 100 may be located in a GERAN network.

For example, the data communication between the sending end 110 and the receiving end 120 may be data communication between a base station and a terminal. The base station may be a base station located in a GERAN network. The terminal can be a wireless device (Radio device), a cellular phone device (Cellular telephone device), a computer device (Computing device), a personal communication device (Personal communication system device) or any other device equipped with wireless communication.

In the communication system 100, the pulse structure sent by the sending end 110 can divide the pulse structure in the existing PCE scheme into N sub-pulses, so that the number of symbols in each sub-pulse sent by the sending end 110 is compared with the existing PCE scheme. The number of symbols in the pulse is small, that is, the sub-pulse sent by the transmitting end 110 supports a smaller transmission time interval, so that the width of the sub-carrier can be increased, the defect that the PCE scheme is sensitive to frequency errors can be improved, and the robustness of the PCE scheme can be enhanced. . In the embodiment of the present invention, a pulse may be called a sending unit, and a sub-pulse may be called a sub-sending unit.

Fig. 4 shows a method for sending data provided in an embodiment of the present invention by way of example. The method includes the following parts.

210. Divide X1 effective information symbols in a transmission unit with a transmission time of T into N sub-transmission units and insert training sequence symbols into each sub-transmission unit, so that the number of effective information symbols in the N sub-transmission units is less than The sum is less than or equal to X1, and the sum Y2 of the number of training sequence symbols in the N sub-transmission units is smaller than the number Y1 of the training sequence symbols in the one transmission unit, where X1, Y1, Y2, and N are integers.

For example, at the normal symbol rate (NSR: Normal Symbol Rate), if the symbol mapping method is not changed, the data of an existing pulse is divided into two consecutive sub-pulses for transmission, that is, through two consecutive sub-pulses The sending unit sends, N is equal to 2, the number of effective information symbols X1 of the original sending unit is equal to 116, and the number of training sequence symbols Y1 is equal to 26. Then, in order to make each sub-transmitting unit have enough space for placing CP, so, you can The 26 training sequence symbols are appropriately reduced, so that the total number of training sequence symbols in the two sub-transmission units is reduced to 20, that is, Y2 is equal to 20. Since the sub-transmission unit and one transmission unit have the same symbol mapping method, the sum of effective information symbols of the two sub-transmission units is equal to X1. Similarly, at the high symbol rate (HSR: Higher Symbol Rate), if the form of symbol mapping is not changed, X1 can be equal to 138, Y1 can be equal to 31, Y2 can be equal to 23, N can be equal to 2 and the sum of effective information symbols of the two sub-transmission units Equal to X1.

In another embodiment of the present invention, the sending end can use high-order modulation for the information in the N sub-transmission units. Since the use of high-order modulation can reduce the number of effective information symbols occupied by the same effective information bits, each The sum of the numbers of valid information symbols in the sub-sending units may be less than X1.

The training sequence symbols can be evenly distributed among the valid information symbols. The training sequence symbol of the sub-transmitting unit can be redesigned, that is, it can be different from the training sequence symbol of the original sending unit.

In an embodiment of the present invention provided by way of example, when N is 1, the number of Y1 can be reduced to Y2. Because the total number of symbols contained in the last N sub-transmission units is equal to the total number of symbols contained in one transmission unit, so, in the embodiment of the present invention, the saved symbols can have two purposes: Filling symbols are added to the sending unit. The filling symbols can be zero, random symbols or repetitions of effective information symbols. The purpose of adding filling symbols is to form protection at the edge of the transmission frequency band; the second is to increase the length of the CP in the sub-transmission unit. The length of the CP in the sub-transmission unit is longer than the length of the CP in one transmission unit, which can further reduce multipath interference and reduce the peak-to-average power ratio (PAPR: Peak to Average Power Ratio).

The principle of reducing the training sequence length of Y1 symbols to Y2 training sequence symbols may be to make the performance loss of the overall receiver channel estimation less than an acceptable range, for example, 0.2dB.

Using the method in this embodiment, in the case of the same transmission bandwidth resource, the sum of the number of effective information symbols and the number of training sequence symbols in the sending unit corresponds to the number of subcarriers, and the number also corresponds to the size of the sending time interval. The sending unit supports a smaller sending time interval, which reduces the number of effective information symbols and training sequence symbols, so that the width of the subcarrier can be increased accordingly, so as to improve the sensitivity of the PCE scheme to frequency errors and enhance the robustness of the PCE scheme. Stickiness. At the same time, the peak-to-average power ratio (PAPR: Peak to Average Power Ratio) of the transmitted signal will also be reduced.

In yet another embodiment of the present invention provided by way of example, the X1 effective information symbols to be transmitted are sequentially divided into N sub-transmission units. However, since the N sub-transmission units are adjacent in time, therefore, It can be considered that the channels of the N sub-transmission units do not change much, and the channel estimation information of the previous sub-transmission unit can be used for the channel information of the next sub-transmission unit. Therefore, all Y2 training sequence symbols can be placed in the N sub-transmission units In a certain sub-transmission unit in , for example, all Y2 training sequence symbols can be placed in a sub-transmission unit closer to the middle among the N sub-transmission units

220. Perform a symbol mapping operation, an inverse discrete Fourier transform operation, and an adding cyclic prefix operation on each of the N sub-sending units.

Since the use of high-order modulation can reduce the number of effective information symbols occupied by the same effective information bit, the number of effective information symbols in each sub-transmitting unit will vary with the symbol mapping method. For the sake of simplicity, if there is no In particular, the symbol mapping manner of the N sub-transmission units remains the same as the symbol mapping manner of one transmission unit.

After symbol mapping, an inverse discrete Fourier transform operation is performed on each sub-transmission unit of the N sub-transmission units.

The so-called cyclic prefix is to move the tail signal after discrete Fourier transform to the front end of the sending unit as prefix information, which is used to eliminate inter-symbol interference caused by multipath and subcarriers that cannot maintain mutual orthogonality. intercarrier interference.

The operation of adding a cyclic prefix is specifically to add Z2 cyclic prefix symbols to the front end of each of the N sub-transmission units. The length of the original cyclic prefix of one sending unit is Z1 symbols.

In an embodiment of the present invention provided by way of example, X1 effective information symbols and Y2 training sequence symbols are sequentially divided into N sub-transmission units, Y2 is smaller than Y1, and the GP length remains unchanged In this case, in order to ensure that the total number of symbols of the N sub-transmission units is the same as the number of symbols of one transmission unit, the following relationship must be satisfied, Y2+N*Z2=Y1+Z1, N≥2. If N=2, X1=116, Y1=26 and Z1=6 are used as an example, as shown in Figure 5, a configuration in which Z2 is equal to Z1 is 6 is adopted, and an existing sending unit is divided into 2 sub-sending units , each sub-transmission unit has 58 effective information symbols, 10 training sequence symbols and 6 symbols of CP information, so that the transmission time used by the two sub-transmission units is equal.

In another embodiment of the present invention provided by way of example, it is illustrated with N=2, X1=116, Y1=26 and Z1=Z2=6, as shown in Figure 6a, because the first The channels of the first sub-transmitting unit and the second sub-transmitting unit have little change, and the 26 training sequence symbols can be appropriately reduced, so that the number of training sequence symbols can be reduced to 20, and all the training sequences are sent to the first sub-transmitting unit. In the sub-sending units, the sending time of the first sub-sending unit may be different from the sending time of the second sub-sending unit, but the sum of the sending times of the first sub-sending unit and the second sub-sending unit is equal to one sending unit The transmission time is equal to T, and the total number of symbols transmitted by the two sub-transmission units is also equal to the number of symbols of one transmission unit. At the same time, by using the method in this embodiment, the purpose of further reducing the symbols of the training sequence can be achieved, that is, Y2 can be further reduced, and the saved symbols can be used to add padding symbols to provide a protection function for the edge of the transmission frequency band.

In yet another embodiment of the present invention, N=2, X1=116, Y1=26 and Z1=6 are also used as examples to further reduce the size of Y2, such as Y2=16, in order to ensure that the total number of N sub-sending units The number of symbols is the same as the number of symbols of a sending unit, and the following relationship must be satisfied, Y2+N*Z2=Y1+Z1, and Z2=8 can be deduced, that is, the length of the cyclic prefix of a sub-transmitting unit is greater than that of a sending unit cyclic prefix length. The increased CP can further reduce inter-symbol interference or/and inter-carrier interference, and at the same time, the peak-to-average power ratio (PAPR: Peak to Average Power Ratio) of the transmitted signal will also be reduced.

As shown in Figure 6b, in another embodiment of the present invention provided by way of example, all the training sequences are sent to the first sub-sending unit, and the transmission of the first sub-sending unit and the second sub-sending unit The time is equal.

230. Add P guard time interval symbols to the rear end of the last sub-transmission unit of the N sub-transmission units.

In order to have a time interval for gradually increasing or decreasing the transmitted signal amplitude, it is also necessary to add a guard time GP to the rear end of the last sub-transmitting unit of the N sub-transmitting units. The present invention does not involve modification of the GP length, so the GP length takes a fixed value. If the division of the sub-sending units shown in FIG. 5 and FIG. 6b is taken as an example, after processing 250, the two sub-sending units may be as shown in FIG. 7a or 7b.

240. Perform transmission pulse shaping on the N sub-transmission units after the guard interval is added.

250. Send the pulse-shaped information of each sub-sending unit in the N sub-sending units.

The total number of all symbols in the sent N sub-transmission units is equal to the number of all symbols in one transmission unit with a transmission time T, that is, X1+Y1+Z1+P.

In this embodiment, the X1 effective information symbols in a transmission unit with a transmission time of T can be divided into N sub-transmission units, and the number of effective information symbols and the number of training sequence symbols in each sub-transmission unit can be determined. The transmission interval is reduced to increase the subcarrier width, thereby improving the defect that the PCE technology is sensitive to frequency errors, enhancing the robustness, and improving the processing performance of the PEC scheme. For example, for the sub-transmission unit division method shown in Figure 5, its sub-carrier distribution is shown in Figure 8, and the sub-carrier distribution of one transmission unit is shown in Figure 2, and its sub-carrier width is widened from the original 1.9kHz to It is 4kHZ.

As shown in FIG. 9 , an embodiment of the present invention shows a device 900 by way of example, and the device 900 can complete all the functions of the above embodiment of the method for sending data. The apparatus 900 may use software and/or hardware to implement all the functions of the above method embodiments, for example, the apparatus 900 may include one or more processors, and the one or more processors may implement all of the above method embodiments Function. For example, the apparatus 900 may include an allocation unit 910 , a mapping unit 920 , an inverse discrete Fourier transform unit 930 , a cyclic prefix processing unit 940 , a guard time processing unit 950 , a transmission pulse shaping unit 960 and a transmission unit 970 .

The allocating unit 910 is configured to divide the X1 effective information symbols in a transmission unit with a transmission time of T into N sub-transmission units and insert training sequence symbols into each sub-transmission unit, and the effective information symbols in the N sub-transmission units The sum of the numbers is less than or equal to X1, and the sum Y2 of the numbers of the training sequences in the N sub-sending units is smaller than the number Y1 of the training sequences in the one sending unit.

The mapping unit 920 is configured to perform symbol mapping on symbols in each of the N sub-transmission units. The inverse discrete Fourier transform unit 930 is configured to perform inverse discrete Fourier transform on symbols in each sub-transmitting unit of the N sub-transmitting units.

The cyclic prefix processing unit 940 is configured to add a cyclic prefix symbol to the front end of each sub-sending unit in the N sub-sending units. The guard time processing unit 950 is configured to add P guard time interval symbols to the rear end of the last sub-transmission unit of the N sub-transmission units.

The transmit pulse shaping unit 960 is configured to perform transmit pulse shaping on symbols in each of the N sub-transmitting units. The sending unit 970 is configured to send the pulse-shaped information of each sub-sending unit in the N sub-sending units, and the total sending time T of the N sub-sending units.

Wherein, a sending unit whose sending time is T includes X1 effective information symbols, Y1 training sequence symbols, Z1 cyclic prefix symbols and P guard time symbols, and the total number of symbols contained in the N sub-transmitting units It is equal to the total number of symbols included in the one sending unit, and the X1, Y1, Z1, P, Y2 and N are integers.

In another embodiment of the present invention, the allocating unit 910 is further configured to: allocate all the Y2 training sequences to one of the N sub-transmitting units; The information symbols are divided into the N sub-sending units.

In yet another embodiment of the present invention, the allocating unit 910 is further configured to: allocate all the Y2 training sequences to a middle sub-transmitting unit among the N sub-transmitting units.

In yet another embodiment of the present invention, the allocating unit 910 is further configured to: divide the X1 valid information symbols to be sent and the Y2 training sequences into the N sub-transmitting units in sequence, wherein, Each of the N sub-sending units contains one or more training sequences.

In yet another embodiment of the present invention, the allocation unit 910 is further configured to: add padding symbols to the sub-transmission units, so that the total number of symbols contained in the N sub-transmission units is equal to the number of symbols contained in the one transmission unit. The total number of symbols in .

An embodiment of the present invention provides a communication system by way of example, and the communication system includes one or more sending ends. The sending end can complete all the functions in the above method embodiments. Wherein, for the specific implementation details of the sending end, refer to the description of the foregoing embodiments, and details are not repeated here.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. a method that sends data, is characterized in that, described method comprises:

X1 effective information symbol in a transmitting element that is T by transmitting time assigned in N sub-transmitting element and insert training sequence symbols in each sub-transmitting element, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and in described N sub-transmitting element, the number sum Y2 of training sequence symbols is less than the number Y1 of the training sequence symbols in a described transmitting element;

Each sub-transmitting element in described N sub-transmitting element is carried out to sign map, inverse discrete Fourier transform and the operation of increase Cyclic Prefix successively;

The rear end of last sub-transmitting element of described N sub-transmitting element is added to P guard time space character;

N the sub-transmitting element having increased behind protection interval carried out to transmitted shaping;

Send the information after each the sub-transmitting element pulse shaping in described N sub-transmitting element, total transmitting time of described N sub-transmitting element is T;

Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time space character in a transmitting element of T, total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer; X1 effective information symbol in a described transmitting element that is T by transmitting time assigned in N sub-transmitting element and insert training sequence symbols in each sub-transmitting element and comprise:

A described Y2 training sequence symbols is all assigned in a described N sub-transmitting element in sub-transmitting element;

Described X1 effective information symbol to be sent assigned in described N sub-transmitting element.

2. method according to claim 1, is characterized in that, in described N sub-transmitting element, Cyclic Prefix symbol, effective information symbol and the training sequence symbols of each sub-transmitting element transmitting time used equates.

3. method according to claim 1, is characterized in that, the described sub-transmitting element that a described Y2 training sequence symbols is all assigned in the individual sub-transmitting element of described N comprises:

A described Y2 training sequence symbols is all assigned to the middle sub-transmitting element that is arranged in described N sub-transmitting element.

4. according to the method described in claim 1 to 3 any one, it is characterized in that, X1 effective information symbol in a described transmitting element that is T by transmitting time assigned to N sub-transmitting element and comprised:

In sub-transmitting element, add filling symbol, so that total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element.

5. the method for claim 1, is characterized in that, in the operation of described increase Cyclic Prefix, the circulating prefix-length increasing when the transmitting element of Length Ratio of the Cyclic Prefix of increase is long.

6. a processor, is characterized in that, described processor comprises:

Allocation units, assign to N sub-transmitting element and insert training sequence symbols in each sub-transmitting element for X1 effective information symbol in a transmitting element that is T by transmitting time, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and the number sum Y2 of the training sequence symbols in described N sub-transmitting element is less than the number Y1 of the training sequence symbols in a described transmitting element;

Map unit, for carrying out sign map to the symbol in described N the each sub-transmitting element of sub-transmitting element;

Inverse discrete Fourier transform unit, for carrying out inverse discrete Fourier transform to the symbol in described N the each sub-transmitting element of sub-transmitting element;

Circulation prefix processing unit, for increasing Cyclic Prefix symbol by the front end of described N the each sub-transmitting element of sub-transmitting element;

Guard time processing unit, for adding P guard time space character by the rear end of last sub-transmitting element of described N sub-transmitting element;

Transmitted forming unit, for carrying out transmitted shaping by described N the each sub-transmitting element of sub-transmitting element;

Transmitting element, for sending the information after each sub-transmitting element pulse shaping of described N sub-transmitting element, total transmitting time T of described N sub-transmitting element;

Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time space character in a transmitting element of T, total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer; Described allocation units are further used for a described Y2 training sequence symbols all to assign in a described N sub-transmitting element in sub-transmitting element; Described X1 effective information symbol to be sent assigned in described N sub-transmitting element.

7. processor according to claim 6, is characterized in that, described allocation units are further used for:

A described Y2 training sequence symbols is all assigned to the middle sub-transmitting element that is arranged in described N sub-transmitting element.

8. according to the processor described in claim 6 to 7 any one, described allocation units are further used for:

In sub-transmitting element, add filling symbol, so that total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element.

9. processor as claimed in claim 6, is characterized in that, the length of the Cyclic Prefix increasing when the transmitting element of Length Ratio of the Cyclic Prefix that described circulation prefix processing unit increases the sub-transmitting element of described N is long.

10. a device that sends data, is characterized in that, the device of described transmission data comprises:

Assign to the individual sub-transmitting element of N and in each sub-transmitting element, insert the allocation units of training sequence symbols for X1 effective information symbol in a transmitting element that is T by transmitting time, in described N sub-transmitting element, the number sum of effective information symbol is less than or equal to X1, and the number sum Y2 of the training sequence symbols in described N sub-transmitting element is less than the number Y1 of the training sequence symbols in a described transmitting element;

For the symbol in described N the each sub-transmitting element of sub-transmitting element being carried out to the map unit of sign map;

For the symbol in described N the each sub-transmitting element of sub-transmitting element being carried out to the inverse discrete Fourier transform unit of inverse discrete Fourier transform;

For the front end of described N the each sub-transmitting element of sub-transmitting element being increased to the circulation prefix processing unit of Cyclic Prefix symbol;

For the rear end of last sub-transmitting element of described N sub-transmitting element being added to the guard time processing unit of P guard time space character;

For the transmitted forming unit that described N the each sub-transmitting element of sub-transmitting element carried out to transmitted shaping;

For sending the information after each sub-transmitting element pulse shaping of described N sub-transmitting element, the transmitting element of total transmitting time T of described N sub-transmitting element;

Wherein, described transmitting time is to comprise X1 effective information symbol, a Y1 training sequence symbols, a Z1 Cyclic Prefix symbol and P guard time space character in a transmitting element of T, total number of the symbol that the individual sub-transmitting element of described N comprises equals total number of the symbol comprising in a described transmitting element, and described X1, Y1, Z1, P, Y2 and N are integer; Described allocation units are further used for a described Y2 training sequence symbols all to assign in a described N sub-transmitting element in sub-transmitting element; Described X1 effective information symbol to be sent assigned in described N sub-transmitting element.