基于CDMA基站辐射源雷达的动目标检测方法

提出一种利用单天线获取参考信号进行直达波及多径回波抑制的方法,该方法将接收的码分多址(CDMA)前向链路信号利用Walsh码解扩,分解出各个前向链路信道,通过逻辑判决恢复出各信道原始的发射信号数据后再合并,获得纯净的CDMA前向链路信号,将其作为参考信号抑制直达波和多径回波,之后再对回波信号进行相干匹配滤波实现动目标检测。最后通过计算机仿真验证了该方法的有效性。

Approach for Passive Radar MTD Based on CDMA Signal

An approach which uses only single antenna to acquire reference signal to cancel the strong direct signal and multi-path reflected signals is proposed.The concept is that the CDMA forward link channels are divided by dispreading received signal using Walsh codes.After restoring the original signal data of each channel through logic judgement,these channels are combined to construct a pure CDMA forward link signal which is used as a reference signal to cancel the direct signal and multi-path reflected signals.After that,the moving targets can be detected using coherent match filtering of received signal.The effectiveness of this approach is verified by simulation results.