采用相关函数的OFDM雷达通信共享信号处理算法

doi:10.3969/j.issn.1001-2400.2018.04.003

摘要/Abstract

摘要：

针对脉冲体制下正交频分复用雷达-通信共享信号处理问题，提出一种基于相关函数的共享信号处理算法．首先对回波信号补偿脉间多普勒频移；然后与发射信号取相关并进行积累；最后对相关函数取模值平方，得到目标函数在距离多普勒域的二维输出．研究了通信调制对算法的影响，推导了算法的主瓣均值与旁瓣均值，并分析了多普勒对主瓣峰值均值以及旁瓣均值的影响．仿真实验验证了文中算法的正确性，并确定了算法的应用范围．

关键词: 雷达-通信一体化, 正交频分复用, 互模糊函数, 速度补偿

Abstract:

A signal processing method based on the correlation function is proposed for integration of radar and communication with OFDM. First, the Doppler shift between pulses is compensated, then the cross ambiguity function is taken between the compensated signal and transmitted sequence, and finally, the square of the modulus of the cross-ambiguity function output is regarded as the cost function. The range and velocity can be estimated from the peaks of the cost function in the Range-Doppler plane. The randomness property of the communication term has a significant influence on performance. In order to analyze the performance of the proposed method, the mathematical expression for the peak shape and sidelobe mean level is derived, and then the influence of Doppler on the performance is analyzed. Finally, simulation indicates the correctness of the proposed method.

Key words: integration of radar and communication, orthogonal frequency division multiplexing, correlation function, velocity compensation

谷亚彬;张林让;周宇;赵永红. 采用相关函数的OFDM雷达通信共享信号处理算法[J]. 西安电子科技大学学报, 2018, 45(4): 12-17+105.

GU Yabin;ZHANG Linrang;ZHOU Yu;ZHAO Yonghong. OFDM radar and communication sharing signal processing using the correlation function[J]. Journal of Xidian University, 2018, 45(4): 12-17+105.

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