中文摘要：

该文结合中国移动多媒体广播（CMMB）信号的特殊结构,提出了两种CMMB外辐射源雷达参考信号获取方法,即基于CMMB同步信号的自适应滤波提纯算法与利用CMMB调制解调理论的参考信号重构算法。首先给出了两种算法的具体处理流程;接着通过计算机仿真重点分析比较了两种算法的性能,利用实测处理验证了重构算法的有效性。研究表明基于参考信号重构的提纯方法能有效地消除参考信号中的噪声干扰和多径干扰,具有获取参考信号纯度高、算法稳健等优点。

英文摘要：

According to the special structure of China Mobile Multimedia Broadcasting（CMMB） signal,this paper presents two methods for reference signal extraction in passive bistatic radar system based on CMMB signal,the adaptive filter algorithm based on the sync signal of CMMB and the method of reference signal reconstruction based on the theory of modulation and demodulation for CMMB signal.The specific processes of the two proposed algorithms are studied first.And next,the performance of the two methods in the typical multipath environment is compared though simulation and real data verifies the effectiveness of the reconstruction method.Analysis demonstrates that signal reconstruction method can eliminate the multipath clutter and interference in the reference signal more effectively,which indicates that this method can extract the reference signal with high purity and the algorithm is more robust.