一种ZC-OFDM雷达干扰一体化波形设计与处理方法

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

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。

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.