论文部分内容阅读
时间反转镜可在没有任何先验知识的情况下具有自适应匹配声信道的作用。主动式时间反转镜(ATRM)要求阵元收发合置,且信号需两次经过信道,效率低下,而阵处理则进一步增加了系统的复杂性,难以满足水声通信节点追求结构简单、低功耗的要求。为克服上述弊端,提出应用单阵元被动式时间反转镜(PTRM)和虚拟式时间反转镜(VTRM),并对单阵元时间反转镜的聚焦增益进行了讨论。计算机仿真结果表明,单阵元时间反转镜可聚焦多途信号,实时实现自适应信道均衡,从而抑制码间干扰、提高信噪比。
The time reversal mirror can adaptively match the acoustic channel without any prior knowledge. The active time-reversal mirror (ATRM) requires that the array elements transceive and transmit signals, and the signal needs to go through the channel twice, which is inefficient. Array processing further increases the complexity of the system and makes it difficult to meet the requirements of underwater acoustic communication nodes for simple structure and low Power requirements. In order to overcome the above drawbacks, a single-element passive time-reversal mirror (PTRM) and a virtual time-reversal mirror (VTRM) are proposed. The focusing gain of single-element time-reversal mirror is discussed. Computer simulation results show that the single-element time-reversal mirror can focus on multi-path signals and achieve adaptive channel equalization in real time, thereby suppressing intersymbol interference and improving signal-to-noise ratio.