在山地及城市附近的应用中，严重的多径杂波造成基于调频广播的无源双基地雷达直达波信号恢复困难。文中提出了采用基于空间分集的常数模盲均衡算法，利用空间分集的多通道，实现信号衰落的补偿，而利用常数模盲均衡算法，实现恒模的调频广播信号的反卷积运算，从而完成了对多径的抑制，获得高质量的直达波信号。计算机仿真表明：与无分集的常数模盲均衡算法相比，所提算法获得了更好的目标检测性能。

It is a tough task for the passive bistatic radar to recover the direct signal from severe multipath clutters in hilly or urban areas. Constant modulus algorithm (CMA) based on space diversity is proposed to accomplish the recovery of the direct signal under such circumstances. Fading effect is avoided by the non-coherent feature of the multichannel signals, and the suppression of the multipath reflections is carried out by the blind deconvolution operation of the CMA. Computer simulations show that the proposed algorithm has achieved better performance in comparison with the conventional CMA algorithm.

TN957

江苏省自然科学基金资助项目；中央高校基本科研业务费专项资助项目