Method for achieving shared communication by modulating radar imaging waveforms through random matrix

A random matrix and radar imaging technology, applied in the modulation carrier system, using re-radiation, radio wave reflection/re-radiation, etc., can solve the problem of not considering the ability of shared communication, so as to ensure the quality of data communication and communication efficiency. Excellent communication performance and reduced complexity

Active Publication Date: 2020-08-25
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above literature only considers the use of random matrix modulation-OFDM waveform to realize radar SAR imaging, but does not consider the ability of using this waveform to realize shared communication

Method used

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  • Method for achieving shared communication by modulating radar imaging waveforms through random matrix
  • Method for achieving shared communication by modulating radar imaging waveforms through random matrix
  • Method for achieving shared communication by modulating radar imaging waveforms through random matrix

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Experimental program
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Embodiment 1

[0034] combine figure 1 This embodiment is described. This embodiment provides a method of using random matrix modulation radar imaging waveforms to realize shared communication. The steps are as follows:

[0035] Step 1: Construct a random matrix modulation-OFDM waveform library on the OFDM waveform using the basic waveform and random matrix;

[0036] Step 2: Select parameters to verify the relevant performance of the waveform, if the performance is not good, return to step 1;

[0037] Step 3: Determine different transmission methods at the transmitter according to different communication methods, and select corresponding parameters according to radar performance and communication transmission requirements;

[0038] Step 4: At the radar receiving end, use the pseudo-orthogonality of the transmitted signal to separate the echo signal to realize radar imaging; at the communication receiving end, use the received signal to have a higher output end of the matched filter correspo...

Embodiment 2

[0041] A method for realizing shared communication by using random matrix modulation radar imaging waveform described in this embodiment also includes the application scenario of the waveform:

[0042] Integrated system architecture such as figure 1 As shown, the radar and communication reception signals are received by separate receivers, and the radar high-resolution imaging is realized at the radar receiving end, and the communication information is transmitted at the communication receiving end.

Embodiment 3

[0044] A method for realizing shared communication by using random matrix modulation radar imaging waveform described in this embodiment, the specific process of constructing the waveform library in step 1 includes:

[0045]Construct an OFDM waveform with M subcarriers and N subsymbols, and use a 0 / 1 random matrix and a waveform basis matrix to construct a random matrix-OFDM waveform; the random matrix-OFDM waveform contains the basis of multiple different subcarrier frequencies and constant subduration FM waveform, the basic FM waveform is a radar waveform with a large time-bandwidth product: linear FM waveform or nonlinear FM waveform; waveform base matrix, there are three forms, up FM, down FM, and mixed FM, and the correlation performance of the mixed FM base is the best good;

[0046] The 0 / 1 random matrix is ​​a sparse matrix in which the elements of each row and column respectively take the value of 0 or 1. For an M×N-dimensional matrix, where N≥M, coexist when M is an ...

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Abstract

The invention discloses a method for achieving shared communication by modulating radar imaging waveforms through a random matrix. The method comprises the steps: constructing a random matrix modulation-OFDM waveform library on the OFDM waveform by utilizing the basic waveform and the random matrix; determining different transmitting modes at a transmitting end according to different communicationmodes, selecting corresponding parameters according to radar performance and communication transmission requirements, and separating echo signals at a radar receiving end by utilizing pseudo-orthogonality of transmitting signals to realize radar imaging; at a communication receiving end, demodulating the communication information by utilizing the fact that a received signal has a relatively hightarget peak at the output end of a matched filter corresponding to a transmitted waveform. According to the invention, the excellent radar imaging performance of the waveform is maintained, and the waveform is utilized to realize shared communication; based on the richness and good orthogonality of the random matrix modulation-OFDM waveform number, the method can guarantee a higher data communication rate and higher data communication quality.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a method for realizing shared communication by using random matrix modulation radar imaging waveform, in particular, a method for using an OFDM radar imaging waveform based on random matrix modulation for dual function sharing of radar communication. Background technique [0002] Shared radar communication refers to realizing the functions of radar detection and data communication at the same time by sharing software or hardware resources such as signals, channels, and antennas. It has the advantages of resource intensification and function enhancement, and can effectively solve the resource waste and Disadvantages such as functional conflict, high cost and poor mobility. [0003] The use of waveforms to realize radar communication function sharing has the advantages of simplifying the structure, saving spectrum resources, avoiding a large amount of electromagnetic i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26G01S13/90G01S7/41
CPCG01S7/41G01S13/90H04L27/2601H04L27/2614G01S7/006G01S13/347
Inventor 洪升朱琪董延涛杨凯凯叶延恒
Owner NANCHANG UNIV
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