It's well known that underwater acoustic channel is a coherent multi-path channel, which brings difficulties in signal processing because of the complexity of the received signal sequence.
众所周知，水下声信道是相干多途信道，信号在信道中的多径传播使得接收信号序列复杂化，因而极大地增加了信号处理的难度。
Detection and classification of weak underwater signals are difficult problems in processing acoustic signals.
水下弱信号的检测和分类是水声信号处理领域中的难题。
Because the system has the characteristics of the high integration, excellent portability and expansibility, it is applied to the underwater acoustic array signal acquisition and processing.
该系统集成度高，具有良好的便携性和可扩展性，在水声基阵信号采集与分析中广泛应用。
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