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

Abstract

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

CLC Number:

TN973

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.

Figures/Tables 17

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References 26

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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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ZC-OFDM-based radar interference integrated waveform design and processing method

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