【摘要】 提出单阵元无源时间反转镜(PTRM),在对声信道没有任何先验知识的情况下可与信道自动匹配,实现自适应聚焦。并将其应用于Pattern时延差编码(PDS)水声通信体制,构成无源时间反转镜Pattern时延差编码水声通信系统(PTRM- PDS)。通过计算机仿真研究及湖试,验证了PTRM-PDS系统能够抑制声信道多途扩展产生的码间干扰,可在时变、空变的声信道中实现低误码率通信,具有很好的鲁棒性。更多还原

【Abstract】 The single sensor Passive Time Reversal Mirror(PTRM)is introduced which could match the acoustic channel automatically and lead to an adaptive focusing. PTRM is applied to Pattern Time Delay Shift Coding(PDS) that is called PTRM-PDS underwater acoustic communication system. The results of computer simulations and lake trials show that the PTRM-PDS system could mitigate the ISI caused by acoustic channel’s multipath and adapt to spatial-temporal variant channel robustly with low bit-error-rate.更多还原