中文摘要：

多基地声呐系统的多个发射基阵采用不同载频探测信号同时发射，在接收基阵端则会产生多种不同载频的混合叠加回波信号，对目标回波信号特征提取前需要对对应探测信号的各回波分量进行分离，采用带通和低通滤波器组能达到分离的目的，但是运算量大，难以实时实现，为此提出采用多相滤波器组信道化接收技术，设计出系统回波信号的接收处理方法，与低通滤波器组实现方法相比，计算量降低，最后介绍了回波信号的相关处理和频域离散小波变换特征提取技术，并通过仿真对原始回波信号和接收处理后的回波信号进行了特征提取对比，验证了多相滤波器组信道化技术在多基地声呐系统中的可行性。

英文摘要：

Multiple carrier frequency detecting signals are transmitted simultaneously by multiple transmitters in multi-static sonar system. The echoes are mixed with different carrier frequencies in the receiver. Different carrier frequency echoes must be separated from one another before the features of the echoes are extracted in the receiver. Such a problem can be solved by band-pass and low-pass filters. But the amount of operation using these methods is too large for real-time realization. Thus this paper presents a ehannelized receiving technique based on muhiphase filter, and an echo receiving scheme. The proposed receiving technique needs smaller amount of operation compared with band-pass and low-pass filter methods. At last, the related echo signal processing technique and FDWT feature extraction technique are introduced. In order to verify the feasibility of this scheme in multistatic sonar system, the extracted features of original echo are compared with those of processed echo via simulation. Simulation results show that the proposed receiving technique can provide nice performance.