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An integrated waveform design method for ofdm radar communication based on frequency domain zero-setting modulation

A waveform design and zero-setting technology, which is applied in the modulation carrier system, multi-frequency code system, radio wave measurement system, etc., can solve problems such as spectrum compatibility or interference, and achieve the effect of communication data transmission optimization

Active Publication Date: 2020-10-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] Aiming at the existing waveform design of OFDM radar communication integration, the present invention realizes certain radar communication performance by designing some parameters, without considering the technical problems of spectrum compatibility or interference, and discloses an OFDM radar based on frequency domain zeroing modulation Communication Integrated Waveform Design Method

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  • An integrated waveform design method for ofdm radar communication based on frequency domain zero-setting modulation
  • An integrated waveform design method for ofdm radar communication based on frequency domain zero-setting modulation
  • An integrated waveform design method for ofdm radar communication based on frequency domain zero-setting modulation

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[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0038] The present invention mainly adopts the method of computer simulation for verification, and all steps and conclusions are verified correctly on MATLAB-R2014a.

[0039] see Figure 1-a , the specific implementation steps of using the signal generator to generate the required signal are as follows:

[0040] Step 1. Initialize system parameters:

[0041] The initialization system parameters include: OFDM signal bandwidth B=100MHZ, time width T=2.075μs, number of subcarriers N=256, subcarrier frequency interval Δf=B / N, number of sampling points K=N=256, sampling rate f s=N / T, the spectrum compatible frequency band is set to [209Δf,229Δf], and the spectrum is set to zero frequency band (Ω i , i=1,2,...16) total number is 16, input ...

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Abstract

The invention discloses an OFDM radar communication integrated waveform design method based on frequency domain zeroing modulation. The invention realizes the communication data transmission by using the multi-waveform optimization design method of zeroing in the frequency domain, and at the same time optimizes the radar performance of the signal. In the radar transmission part, combined with the two parameters of signal autocorrelation peak sidelobe level and signal envelope fluctuation factor in radar waveform design, the subcarrier reservation method is used to design and construct a convex optimization problem, and the SDP method based on randomization is used to solve the problem. This problem is solved. In the radar receiving part, the autocorrelation characteristics of the signal are verified by matched filtering, and certain signal processing is carried out. In the communication receiving part, the signal is demodulated using the method based on the minimum sub-band energy, and finally the demodulated binary communication data is generated. The invention not only considers the spectrum compatibility characteristic of the signal, but also optimizes the radar characteristic of the waveform while realizing the communication data transmission by using the multi-waveform optimization design problem.

Description

technical field [0001] The invention belongs to the field of radar communication integrated waveform design, in particular to an OFDM (orthogonal frequency division multiplexing) radar communication integrated waveform design method based on frequency domain zero-set modulation. Background technique [0002] With the development of information technology, the electromagnetic environment is becoming increasingly complex, and various electronic equipment brings different interference to combat platforms, and these electronic equipment are necessary. Radar is used to detect targets, and communication systems are used to transmit information. Combat equipment used to interfere with the enemy. For a long time, radar equipment and communication equipment have been studied separately due to their different functions and different signal processing methods, especially before digital signal processing was widely used. Comparing the radar system and the communication system, we found...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/28H04L27/26H04L5/00
CPCG01S7/023G01S7/28H04L5/0044H04L27/2602
Inventor 崔国龙李雯李固冲李洋漾杨靖孔令讲
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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