received signal短语³²²⁶³ 基本例句 接收信号 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。 cnki