CAJ | 학술논문

研究水下信息获取系统,在非均匀介质中实现声束的自适应聚焦,应用于水声组网通信时,可以很好地利用海洋信道中的多径特性,提高节点间的通信速率,为消除码间干扰和改善误码率,提出了一种基于分布式时间反转法的水卢组网通信方案,充分利用网络中多个独立节点的自身资源,组成分布式时反组网通信系统,组网节点不需要再设置传统时间反转法所必需的垂直线列阵,易于工程实现.利用海洋环境实测数据得到的仿真结果表明提出的分布式时反组网通信与传统时间反转法组网通信性能相当,联合判决反馈均衡器可进一步提高系统件能.
연구수하신식획취계통,재비균균개질중실현성속적자괄응취초,응용우수성조망통신시,가이흔호지이용해양신도중적다경특성,제고절점간적통신속솔,위소제마간간우화개선오마솔,제출료일충기우분포식시간반전법적수로조망통신방안,충분이용망락중다개독립절점적자신자원,조성분포식시반조망통신계통,조망절점불수요재설치전통시간반전법소필수적수직선렬진,역우공정실현.이용해양배경실측수거득도적방진결과표명제출적분포식시반조망통신여전통시간반전법조망통신성능상당,연합판결반궤균형기가진일보제고계통건능.
The application of time reversal technique in the underwater acoustic communication can significantly reduce the intersymbol interference (ISI) caused by multi-path propagation, and increase the communication data rate by using multi-path propagation feature in the ocean channel. However, a vertical linear array is required in the traditional time reversal communication, which results in the complexion of multi-node communication net-works. This paper proposed a distributed time reversal communication project by using the hardware resources of in-dependent single node of the multi-node communication networks instead of vertical linear army of traditional meth-od. The simulation result reveals that this proposed distributed time reversal system could realize the focusing of multi -path signal, alleviating the ISI caused by multi-path propagation. Moreover, better system performance could be achieved by combining this technique with equalization.