一种ZC-OFDM雷达干扰一体化波形设计与处理方法

doi:10.12305/j.issn.1001-506X.2024.09.12

摘要/Abstract

摘要：

雷达干扰一体化是优化射频资源、实现定向干扰的有效技术路径, 雷达干扰一体化波形设计是雷达干扰一体化研究的重点。本文提出一种基于Zadoff-Chu序列和正交频分复用架构的雷达干扰一体化波形, 研究了波形的设计与处理方法。波形以正交频分复用为调制方式、以时频分割复用为基本架构、通过Zadoff-Chu和Mersenne-Twister序列对频域子载波进行合理的分配和调制完成探测与干扰功能一体, 在信号处理时采用先探干时频分离再脉冲压缩和相参处理的方式实现测距测速。理论分析和仿真试验表明，所提波形同时具备脉冲压缩主副瓣比大、多普勒容限强以及频率对准灵活、干扰随机性强的探干一体性能优点。

关键词: 雷达干扰一体化, 正交频分复用, Zadoff-Chu序列, Mersenne-Twister序列

Abstract:

The integration of radar interference is an effective technical path to optimize radio frequency resources and realize directional interference. Radar interference integrated waveform design is a hot spot in radar interference integrated research. This paper presents an radar interference integrated waveform based on Zadoff-Chu sequence and orthogonal frequency division multiplexing (OFDM) architecture, and studies the waveform design and processing methods. The waveform uses OFDM as the modulation mode and time-frequency division multiplexing as the basic architecture. The frequency domain subcarriers are reasonably allocated and modulated through Zadoff-Chu and Mersenne-Twister sequences to achieve the integration of detection and interference functions. In signal processing, the first step is to separate the time and frequency of interference detection, and the second step is to conduct pulse compression and coherent processing, so as to achieve ranging and velocity measurement. Theoretical analysis and simulation test show that the proposed waveform has the advantages of high ratio of main lobe to side lobe of pulse compression, strong Doppler tolerance, flexible frequency alignment and strong interference randomness.

Key words: radar interference integrated, orthogonal frequency division multiplexing (OFDM), Zadoff-Chu sequence, Mersenne-Twister sequence

中图分类号:

TN973

刘方正, 曾瑞琪, 龚阳, 韩振中. 一种ZC-OFDM雷达干扰一体化波形设计与处理方法[J]. 系统工程与电子技术, 2024, 46(9): 2999-3011.

Fangzheng LIU, Ruiqi ZENG, Yang GONG, Zhenzhong HAN. ZC-OFDM-based radar interference integrated waveform design and processing method[J]. Systems Engineering and Electronics, 2024, 46(9): 2999-3011.

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参数符号	参数名称	数值
R/km	一体化平台与目标相对距离	50
v/(m/s)	一体化平台与目标相对速度	100
f^e_c₁/GHz	目标雷达波形工作载频1	10.5
f_c^e₂/GHz	目标雷达波形工作载频2	10.7
B^e/MHz	目标雷达波形带宽	20
t_p^e/μs	目标雷达波形时宽	10
T_r^e/μs	目标雷达重复周期	100
N_r^e	目标雷达相参测速脉冲个数	16
P_t/W	目标雷达波形发射功率	10 000
G_t/dB	目标雷达天线增益	45
κ_e/dB	目标雷达波形接收信噪比	10
c/(m/s)	电磁波传播速度	3×10⁸

参数符号	参数名称	数值
f_c^y/GHz	一体化波形载频	10.5
t_p^y/μs	一体化波形时宽	10
f_t^y/GHz	一体化波形探测部分起始频率	10.4
B_t/MHz	一体化波形探测部分带宽	20
f^y_g₁/GHz	一体化波形干扰部分起始频率1	10.48
f^y_g₂/GHz	一体化波形干扰部分起始频率2	10.68
B_g/MHz	一体化波形干扰部分带宽	50
f_s/GHz	一体化波形中频采样率	2.4
f₀/GHz	一体化波形中频频率	0.5
T_r^y/μs	一体化波形发射重复周期	100
N_r^y	一体化波形相参测速脉冲数目	16
P_y/W	一体化波形发射功率	2 000
G_y/dB	一体化波形天线增益	45
σ/m²	一体化平台雷达散射截面	50
κ_y/dB	一体化波形接收信噪比	10
γ_j	一体化波形对目标雷达的极化系数	0.1

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