无时钟同步下双基地雷达的相位误差补偿算法  

A Phase Error Compensation Algorithm for Bistatic Radar Without Clock Synchronization

作　　者：周昱 郑霖[1,3] 邓小芳 张文辉[2] ZHOU Yu;ZHENG Lin;DENG Xiaofang;ZHANG Wenhui(Guilin University of Electronic Technology,Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing,Guilin 541004 China;Guilin University of Electronic Technology,Guangxi Cooperative Innovation Center of Cloud Computing and Big Data,Guilin 541004 China;Science and Technology on Communication Networks Laboratory,Shijiazhuang 050081 China)

机构地区：[1]桂林电子科技大学广西无线宽带通信和信号处理重点实验室,广西桂林541004 [2]桂林电子科技大学广西云计算与大数据协同创新中心,广西桂林541004 [3]通信网信息传输与分发技术重点实验室,石家庄050081

出　　处：《电光与控制》2020年第3期22-26,共5页Electronics Optics & Control

基　　金：国家自然科学基金(61571143,61371107);广西重点研发项目(桂科AB18126030);广西云计算与大数据协同创新中心、广西高校云计算与复杂系统重点实验室资助(1716)。

摘　　要：在双基地雷达中,由于时钟源不同步会给接收信号上带来载波频率偏差以及时间同步误差等影响因素,影响精确定位和慢速微多普勒检测。针对这些影响因素,提出一种基于直达波相位的相位补偿算法和基于距离多普勒谱频域对消的联合处理算法。该算法不需要双基地系统有共用时钟源。首先,通过直达波的相位对所有接收信号做相位补偿,抵消了载波频率偏差带来的相位误差;再利用距离多普勒谱的数据在多普勒维上做频域对消,有效地去除了时间同步误差带来的旁峰干扰。该算法复杂度低、易于实现,经过理论推导和实验验证,验证了该算法的有效性。In the bistatic radar the unsynchronized clock source will bring carrier frequency deviation and time synchronization error to the received signal which may affect the accurate positioning and slow micro-Doppler detection.Aiming at these factors a combined processing algorithm is proposed based on phase compensation of direct wave phase and frequency-domain cancellation of the range Doppler spectrum.The algorithm does not need a shared clock source for the bistatic system.Firstly all received signals are Scompensated by the phase of the direct wave to offset the phase error caused by carrier frequency deviation.Then the side-peak interference caused by the time synchronization error is effectively eliminated by frequency-domain cancellation using the data of range Doppler spectrum.This algorithm has low complexity and is easy to implement.The validity of the algorithm is verified by theoretical derivation and experiments.

关 键 词：目标检测 双基地雷达 相参积累 相位补偿 

分 类 号：TN957.51[电子电信—信号与信息处理]