虚拟时间反转镜Pattern时延差编码水声通信

提出虚拟时间反转镜(VTRM)算法,并基于Pattern时延差编码(PDS)水声通信体制,研究了VTRM在水声通信中的应用。PDS水声通信体制利用Pattern码元出现在码元窗的时延差值进行时延编码,具有稳健的通信性能。虚拟时间反转镜技术具有空间聚焦和信道均衡的性质,将其应用于PDS体制水声通信中,较时间反转镜(TRM)简单易行却又具有TRM的性质。计算机仿真结果表明,VTRM有效地抑制了水声信道严重的多途扩展对Pattern波形的畸变,提高了通信质量。

Virtual Time Reversed Pattern Time Delay Shift Coding Scheme for Underwater Acoustic Communication

The algorithm of the virtual time reversal mirror (VTRM) was proposed and applied to the underwater acoustic communication based on the Pattern time delay shift coding scheme. The time delay shift values of the pattern were used to encode the digital information in the PDS system, which was a robust and effective scheme for the underwater acoustic communication. The virtual time reversal mirror led to spatial focusing and adaptive channel equalization. VTRM was applied to the PDS system that could decrease the aberrance of the Pattern caused by the channel multipath greatly and easily to realize than the TRM. The results of numerical simulations show that the application of VTRM improves the performance of underwater acoustic communication.