KR102315039B1 - Channel correction multichannel transceiver and method - Google Patents

Abstract

The present invention relates to a multi-channel transceiver capable of channel correction and a method, comprising at least a transceiver module for transmitting or receiving an RF signal through multiple channels in a normal operation mode and a balloon module for providing an RF correction signal in an RF correction mode One transceiver, a local oscillator that provides a local signal to the balloon module, and a delay correction signal generated by providing a calibration signal to the balloon module in the RF correction mode and delaying the calibration signal by applying a weight to the received RF signal A multi-channel transceiver capable of channel correction comprising an RF correction unit including a weight calculation module that receives the generated weighted RF signal and applies the weighted RF signal to the transmitted RF signal.

Description

Channel Compensation Multi-Channel Transceiver and Method

The present invention relates to a channel-correctable multi-channel transmission/reception technology, and more particularly, to a channel-correctable multi-channel transmission/reception device and method having a self-correction function by using a signal known in the device or a signal directly created as a reference signal. it's about

Recently, digital beamforming systems using array antennas are being used in various fields such as digital communication systems, radar, lidar, 5G communication, and GNSS receivers. A digital beamforming system can steer a beam in a desired direction while gaining a gain equal to the number of antennas, and at the same time remove unwanted noise or interference signals.

In the digital beamforming system, the gain and phase error of the transmission/reception board (hereinafter referred to as the T/R board) of each channel bring a direction error or magnitude error for the function of beam forming or jamming removal, which is a digital beam using an array antenna. It is the main cause of lowering the performance of the forming system. The error of the T/R board varies slightly depending on the temperature and humidity or the size, type of input signal, individual characteristics of the RF device, phase, and gain, even if each RF device is within the normal operating range, and the accumulation of these values This results in larger errors. In order to be applied to the digital beamforming system, it is necessary to calibrate the T/R board in connection with a measuring instrument or an external precision compensator, which increases the manufacturing cost.

Korean Patent No. 10-2061620 (2019.12.26) relates to a phased array antenna module, a phased array antenna system including the same, and a signal correction method using the same, and more specifically, the phased array antenna module includes a substrate, a first, second, third and fourth antennas, a coupler and a beamformer chip, wherein the first, second, third and fourth antennas are formed on a first side of the substrate, and a 2*2 matrix The coupler is formed on the first surface of the substrate, and commonly senses signals of the first, second, third and fourth antennas, and the first, second, third and fourth antennas The first, second, third and fourth distances are all the same, and the beamformer chip is formed on a second surface opposite to the first surface of the substrate, is electrically connected to the coupler, and the first , a correction circuit for providing or receiving signals of the second, third and fourth antennas, and compensating for the signals of the first, second, third and fourth antennas.

Korean Patent Laid-Open No. 10-2007-0032548 (2007.03.22) relates to an apparatus and method for correcting a channel in a wireless communication system using multiple antennas, and more particularly, to a first reverse channel by receiving a reverse sounding signal. information estimating, receiving a reverse sounding signal weighted with forward channel information and estimating second reverse channel information, each using the first reverse channel information and the second reverse channel information calculating a correction value for the antenna pair; and obtaining a corrected channel response matrix by correcting the first reverse channel information using the calculated correction values.

Korean Patent Registration No. 10-2061620 (2019.12.26) Korean Patent Publication No. 10-2007-0032548 (2007.03.22)

One embodiment of the present invention relates to a multi-channel transceiver and method capable of channel correction capable of calculating a weight based on a known signal or a signal directly generated.

One embodiment of the present invention relates to a channel-correctable multi-channel transceiver and method capable of controlling a normal operation mode and an RF correction mode through a switch operation.

An embodiment of the present invention relates to a multi-channel transceiver and method capable of channel correction capable of determining a weight for a transmission signal based on generation of a weight for the received signal.

In embodiments, the multi-channel transceiver capable of channel correction includes at least one transceiver including a transceiver module that transmits or receives an RF signal through multiple channels in a normal operation mode and a balloon module that provides an RF correction signal in the RF correction mode. A local oscillator for providing a negative and local signal to the balloon module, a calibration signal generating module for providing a calibration signal to the balloon module in the RF correction mode, and a delay calibration signal generated by time delaying the calibration signal and from the transceiver and an RF compensator including a weight calculation module that calculates a weight based on the received intermediate signal and applies the weight to the intermediate signal.

The transceiver further includes an RF down-conversion module, and generates an IF digital signal through the RF down-conversion module based on the RF signal in the normal operation mode, and the RF correction signal in the RF correction mode. Based on , the intermediate signal may be generated through the RF down-conversion module.

The transceiver may determine transmission and reception operations through a transmission/reception selection switch.

The RF compensator may generate the weight by calculating phase and gain coefficients such that a difference between the delay correction signal and the intermediate signal is minimized.

The RF compensator may generate the weights through a least-squares method.

The RF compensator may generate a second correction signal based on the first correction signal generated through the intermediate signal when the operation mode of the transceiver is the RF correction mode.

The RF compensator may regenerate the weights such that a difference between the first correction signal and the time-delayed second correction signal is minimized.

The transceiver may generate the transmission signal by providing the second correction signal to the transmission RF down-conversion module.

In embodiments, a channel-correctable multi-channel transmission/reception method includes a signal receiving step of receiving a calibration signal and a local oscillation signal in an RF correction mode, providing the calibration signal and the local oscillation signal to a balloon module to generate an RF correction signal, An intermediate signal generating step of providing the RF correction signal to the RF down-conversion module, generating an intermediate signal through the RF down-conversion module, and a delay correction signal generated by delaying the calibration signal and the intermediate signal by receiving the intermediate signal and calculating a weight so that a difference between the delay correction signal and the intermediate signal is minimized.

The disclosed technology may have the following effects. However, this does not mean that a specific embodiment should include all of the following effects or only the following effects, so the scope of the disclosed technology should not be construed as being limited thereby.

A multi-channel transceiver capable of channel correction and a method according to an embodiment of the present invention may calculate a weight based on a known signal or a signal directly generated.

A multi-channel transceiver capable of channel correction and a method according to an embodiment of the present invention can control the normal operation mode and the RF correction mode through a switch operation.

A multi-channel transceiver capable of channel correction and a method according to an embodiment of the present invention may determine a weight for a transmission signal based on generation of a weight for the received signal.

1 is a diagram illustrating a multi-channel transmission/reception system capable of channel correction according to an embodiment.
2 is a diagram illustrating a physical configuration of a multi-channel transceiver capable of channel correction according to an embodiment.
3 is a diagram for describing a functional configuration of a multi-channel transceiver capable of channel correction according to an embodiment.
4 is a view for explaining the configurations of a multi-channel transceiver capable of channel correction according to an embodiment.
5 is a diagram illustrating an RF correction unit of a multi-channel transceiver capable of channel correction according to an embodiment.
6 is a block diagram illustrating a process of calculating a weight by a multi-channel transceiver capable of channel correction according to an embodiment.

Since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

On the other hand, the meaning of the terms described in the present application should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component.

When a component is referred to as being “connected” to another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, “between” and “immediately between” or “neighboring to” and “directly adjacent to”, etc., should be interpreted similarly.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprises" or "have" refer to the embodied feature, number, step, action, component, part or these It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

Identifiers (eg, a, b, c, etc.) in each step are used for convenience of description, and the identification code does not describe the order of each step, and each step clearly indicates a specific order in context. Unless otherwise specified, it may occur in a different order from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

The present invention can be embodied as computer-readable codes on a computer-readable recording medium, and the computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored. . Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. also includes In addition, the computer-readable recording medium may be distributed in a network-connected computer system, and the computer-readable code may be stored and executed in a distributed manner.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Terms defined in general used in the dictionary should be interpreted as being consistent with the meaning in the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present application.

1 is a diagram illustrating a multi-channel transmission/reception system 100 capable of channel correction according to an embodiment of the present invention.

Referring to FIG. 1 , a channel-correctable multi-channel transmission/reception system 100 may include a user terminal 110 , a channel-correctable multi-channel transmission/reception device 130 , and a database 150 .

The user terminal 110 may correspond to a computing device that can check the weight generated by the channel-correctable multi-channel transceiver 130 and control the normal operation mode, the RF correction mode, the reception mode, and the transmission mode. and may be implemented as a smart phone or a wearable device, but is not limited thereto, and may be implemented in various devices such as a tablet PC. The user terminal 110 may be connected to the channel-correctable multi-channel transceiver 130 through a network, and the plurality of user terminals 110 may be simultaneously connected to the channel-correctable multi-channel transceiver 130 .

The channel-correctable multi-channel transceiver 130 receives the calibration signal and the local oscillation signal, generates an RF correction signal based on the signals, and provides the RF correction signal to the RF down-conversion module to generate an intermediate signal and the intermediate signal and a server corresponding to a computer or program that performs a process of calculating a weight based on the delay correction signal. The multi-channel transceiver 130 capable of channel correction may be wirelessly connected to the user terminal 110 through Bluetooth, WiFi, a communication network, or the like, and may exchange data with the user terminal 110 through the network.

The database 150 receives the calibration signal and the local oscillation signal, generates an RF correction signal based on the signals, and provides the RF correction signal to the RF down-conversion module to generate an intermediate signal and based on the intermediate signal and the delay correction signal It may correspond to a storage device that stores various information necessary in the process of calculating the weight. In addition, the database 150 receives the calibration signal and the local oscillation signal by the multi-channel transceiver 130 capable of channel correction, generates an RF correction signal based on the signals, and provides the RF correction signal to the RF downconversion module. In the process of generating an intermediate signal and calculating a weight based on the intermediate signal and the delay correction signal, information collected or processed in various forms may be stored.

2 is a diagram for explaining a physical configuration of the multi-channel transceiver 130 capable of channel correction according to an embodiment.

Referring to FIG. 2 , the multi-channel transceiver 130 capable of channel correction may be implemented by including a processor 210 , a memory 230 , a user input/output unit 250 , and a network input/output unit 270 .

The processor 210 receives the calibration signal and the local oscillation signal, generates an RF correction signal based on the signals, and provides the RF correction signal to the RF down-conversion module to generate an intermediate signal and based on the intermediate signal and the delay correction signal It is possible to execute a procedure that performs an operation in the process of calculating the weight with the , and manage the memory 230 to be read or written throughout the process, and to synchronize the volatile memory and the non-volatile memory in the memory 230 . You can schedule time. The processor 210 may control the overall operation of the multi-channel transceiver 130 capable of channel correction, and is electrically connected to the memory 230 , the user input/output unit 250 , and the network input/output unit 270 to provide data therebetween. You can control the flow. The processor 210 may be implemented as a central processing unit (CPU) of the multi-channel transceiver 130 capable of channel correction.

The memory 230 is implemented as a non-volatile memory, such as a solid state drive (SSD) or a hard disk drive (HDD), and includes an auxiliary storage device used to store overall data required for the channel-correctable multi-channel transceiver 130 . and may include a main memory implemented as a volatile memory such as random access memory (RAM).

The user input/output unit 250 may include an environment for receiving a user input and an environment for outputting specific information to the user. For example, the user input/output unit 250 may include an input device including an adapter such as a touch pad, a touch screen, an on-screen keyboard, or a pointing device, and an output device including an adapter such as a monitor or a touch screen. In an embodiment, the user input/output unit 250 may correspond to a computing device accessed through a remote connection, and in such a case, the channel-correctable multi-channel transceiver 130 may be implemented as a server.

The network input/output unit 270 includes an environment for connecting with an external device or system through a network, for example, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), and a VAN (Wide Area Network) (VAN). It may include an adapter for communication such as Value Added Network).

3 is a view for explaining a functional configuration of the multi-channel transceiver 130 capable of channel correction according to an embodiment.

Referring to FIG. 3 , the multi-channel transceiver 130 capable of channel correction may include a transceiver 310 , a local oscillator 330 , an RF compensator 350 , and a controller 390 .

4 is a view for explaining the configurations of the multi-channel transceiver 130 capable of channel correction according to an embodiment.

5 is a view for explaining the RF correction unit 350 of the multi-channel transceiver 130 capable of channel correction according to an embodiment.

The transceiver 310 may include a transceiver module that transmits or receives an RF signal through multiple channels in a normal operation mode and a balloon module 311 that provides an RF correction signal in the RF correction mode. For example, the transceiver 310 may control the normal operation mode and the RF correction mode through the mode selection switch 312 . In the normal operation mode, the transceiver 310 may receive an external signal or transmit an internal signal through an antenna of the transceiver module. The transceiver 310 may convert an external signal, which is an analog signal, into a digital signal by providing the received external signal to the RF down-conversion module 313 in a normal operation mode while converting it to a frequency desired by the user. In the case of the RF correction mode, the transceiver 310 may receive the local oscillation signal from the local oscillator 330 and receive the calibration signal from the RF correction unit 350 and provide it to the balloon module 311 . For example, the transceiver 310 may provide an RF correction signal based on a corresponding local oscillation signal and a calibration signal received through the balloon module. BALUN is an abbreviation of 'Balance-Unbalance' and refers to a device that converts 'Balanced Signal' into 'Unbalanced Signal' or vice versa. A balloon can separate I or Q signals by making one side GND and driving the signal to the other side when an I signal and a Q signal using the same transmission band exist. The balloon module 311 may include a correction signal modulation switch and a balloon BALUN.

In one embodiment, the transceiver 310 further includes an RF down-conversion module 313, and generates an IF digital signal through the RF down-conversion module 313 based on the RF signal in a normal operation mode, In the case of the RF correction mode, an intermediate signal may be generated through the RF down-conversion module 313 based on the RF correction signal. For example, the transceiver 310 may further include an RF down-conversion module 313 capable of converting an analog signal into a digital signal while changing the frequency to a desired frequency. The RF downconversion module 313 may include a receive RF downconversion module 313a and a transmit RF downconversion module 313b. The reception RF down-conversion module 313a may generate an intermediate signal based on the RF correction signal and the local oscillation signal. For example, in a normal operation mode, the transceiver 310 may receive an external RF signal through an antenna and generate an IF digital signal corresponding to a frequency requested by a user with respect to the RF signal. For another example, in the case of the RF operation mode, the transceiver 310 may receive an internal signal from the RF compensator and generate an intermediate signal corresponding to a frequency requested by the user.

In an embodiment, the transceiver 310 may determine transmission and reception operations through the transmission/reception selection switch 314 . For example, the transceiver 310 may control the transmission and reception operations of the multi-channel transceiver 130 capable of channel correction through the transmission/reception selection switch 314 connected to an external antenna.

The local oscillator 330 may provide a local signal to the balloon module 311 . For example, the local oscillator 330 may provide a local signal to the balloon module 311 and the RF down-conversion module 313 . The RF down-conversion module 313 may adjust the frequency of the RF correction signal through the local signal transmitted through the local oscillator 330 .

The RF correction unit 350 time-delays the correction signal generating module 351 and the correction signal 353 that provide the correction signal to the balloon module 311 in the RF correction mode to delay the correction signal 354 and the transceiver. It may include a weight calculation module 352 that calculates a weight based on the intermediate signal received from the 310 and applies the weight to the intermediate signal. For example, the RF compensator 350 may delay the calibration signal generated by the calibration signal generating module 351 to the balloon module 311 and the weight calculation module 352 . For example, the weight may include a reception weight 355a and a transmission weight 355b. For example, the reception weight calculation module 352a may generate the reception weight 355a based on the intermediate signal and the delay correction signal 354 . As another example, the transmission weight calculation module 352b may generate the transmission weight 355b based on the time delay value of the first correction signal and the correction signal to which the reception weight 355a is applied.

In an embodiment, the RF compensator 350 may generate weights by calculating phase and gain coefficients such that the difference between the delay correction signal and the intermediate signal is minimized. For example, the RF compensator 350 may calculate the weight through the weight calculation module 352 configured as an active filter circuit.

In an embodiment, the RF compensator 350 may generate weights through the least squares method. The least squares method is a method of approximation to be close to reality. For example, the transceiver 310 may generate weights by calculating phase and gain coefficients that minimize the difference between the delay correction signal 351 and the intermediate signal.

In an embodiment, the RF compensator 350 may generate a second correction signal based on the first correction signal generated through the intermediate signal when the operation mode of the transceiver 310 is the RF correction mode. For example, the RF correction unit 350 may calculate the transmission weight by applying the least squares method between the first correction signal and the correction signal to which the delayed weight is applied. For example, the RF compensator 350 may generate the second correction signal through mixing between the transmission weight 355b and the calibration signal 353 .

For example, the transceiver 310 transmits the first correction signal generated by applying the weight generated through the least-squares method between the intermediate signal and the delay correction signal 351 by applying the least-squares method to the weighted correction signal and the first correction signal. You can create weights.

In an embodiment, the RF corrector 350 may regenerate the weights such that a difference between the first correction signal and the time-delayed second correction signal is minimized. For example, the RF compensator 350 may regenerate the transmission weight so that the difference between the first correction signal and the time-delayed second correction signal is minimized, and regenerate the second correction signal based on the regenerated transmission weight. The number of times to regenerate the transmission weight may be determined by the user.

In an embodiment, the transceiver 310 may generate a transmission signal by providing the second correction signal to the transmission RF down-conversion module 313b. For example, the transceiver 310 generates a transmit signal by providing the second correction signal provided from the RF correction unit 350 to the transmit RF downlink or module 313b, and transmits it by the transmit/receive selection switch 314 . When the mode is determined, a transmission signal may be transmitted through an antenna.

The controller 370 controls the overall operation of the multi-channel transceiver 130 capable of channel correction, and manages the control flow or data flow between the transceiver 310 , the local oscillator 330 , and the RF compensator 350 . have.

6 is a block diagram illustrating a process of calculating and recalculating freight transportation costs by the channel-correctable multi-channel transceiver 130 according to an embodiment.

Referring to FIG. 6 , the transceiver 310 of the multi-channel transceiver 130 capable of channel correction may receive a calibration signal and a local oscillation signal from the local oscillator 330 and the RF compensator 350 in the RF correction mode. There is (S610).

The channel-correctable multi-channel transceiver 130 provides a calibration signal and a local oscillation signal to the balloon module through the transceiver 310 to generate an RF correction signal, and provides the RF correction signal to the RF downlink module, and the RF downlink An intermediate signal may be generated through the module (S630).

The channel-correctable multi-channel transceiver 130 receives the delay correction signal and the intermediate signal generated by time-delaying the correction signal through the RF correction unit 350, and weights the delay correction signal and the intermediate signal so that the difference between the intermediate signal is minimized. can be calculated (S650).

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

100: multi-channel transmission/reception system capable of channel correction
110: user terminal
130: multi-channel transceiver capable of channel correction
150: database
210: processor 230: memory
250: user input/output unit 270: network input/output unit
310: transceiver 311: balloon module
312: mode select switch 313: RF downconversion module
330: local oscillation unit
350: RF compensator 351: calibration signal generation module
352: weight calculation module 352a: receive weight calculation module
352b: transmit weight calculation module 353: calibration signal
354: delay correction signal 355a: receive weight
355b: transmit weight 370: control unit

Claims (8)

A transmission/reception module for transmitting or receiving an RF signal through multiple channels, an RF down-conversion module 313 and a balloon module 311 for providing an RF correction signal to the RF down-conversion module 313 in an RF correction mode - the balloon module (311) at least one transceiver 310 including - including a correction signal modulation switch and a balloon (BALUN);
a local oscillation unit 330 for providing a local oscillation signal to the balloon of the balloon module 311 in the RF correction mode; and
A calibration signal generating module 351 that provides a calibration signal to the calibration signal modulation switch of the balloon module 311 in the RF calibration mode, and a delay calibration signal generated by time-delaying the calibration signal and the transceiver 310 A multi-channel transceiver capable of channel correction comprising an RF corrector (350) including a weight calculation module (352) for calculating a weight based on the intermediate signal received from the signal and applying the weight to the intermediate signal.
The method of claim 1, wherein the transceiver unit
In the case of a normal operation mode, an IF digital signal is generated through the RF downconversion module based on the RF signal, and in the case of the RF correction mode, the intermediate signal is generated through the RF downconversion module based on the RF correction signal. Multi-channel transceiver capable of channel correction, characterized in that for generating a.
The method of claim 1, wherein the transceiver unit
A multi-channel transceiver capable of channel correction, characterized in that the transmission and reception operations are determined through a transmission/reception selection switch.
The method of claim 2, wherein the RF compensator
and generating the weight by calculating phase and gain coefficients such that a difference between the delay correction signal and the intermediate signal is minimized.
The method of claim 4, wherein the RF compensator
A multi-channel transceiver capable of channel correction, characterized in that the weight is generated through a least-squares method.
The method of claim 4, wherein the RF compensator
and generating a second correction signal based on the first correction signal generated through the intermediate signal when the operation mode of the transceiver is an RF correction mode.
The method of claim 6, wherein the RF correction unit
regenerating the weight so that a difference between the first correction signal and the time-delayed second correction signal is minimized;
the transceiver
A multi-channel transceiver capable of channel correction, characterized in that the second correction signal is provided to a transmission RF down-conversion module to generate a transmission signal.
a signal receiving step of receiving a calibration signal and a local oscillation signal in an RF correction mode;
The correction signal is provided to a correction signal modulation switch of the balloon module or the local oscillation signal is provided to the balloon of the balloon module to generate an RF correction signal and the RF correction signal is provided to the RF down-conversion module, and the RF down-conversion signal is provided. an intermediate signal generating step of generating an intermediate signal through a conversion module; and
and a weight calculation step of receiving the delay correction signal and the intermediate signal generated by delaying the correction signal and calculating a weight so that a difference between the delay correction signal and the intermediate signal is minimized. .

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