强激光与粒子束, 2015, 27 (10): 103252, 网络出版: 2015-11-30
时间反演技术在通信多路径传输中的应用
Application of time reversal technique in multipath signal transmission
时间反演 迭代算法 多路径 注入式实验 波形优化 time reversal iterative arithmetic multipath injection test waveform optimization
摘要
由于信号多路径传输的存在,对于高速率调制的通信信号,传输质量往往会受到影响。因此研究了基于时间反演的通信多路径信号传输算法,通过运用时间反演迭代技巧,在已知空间多路径传输函数的前提下,通过发射时间反演信号,使得信号在接收端聚焦,最终得以提高多路径信道环境下的信噪比,优化了信号波形,降低了误码率,明显减轻了定点通信中多路径传输带来的影响。通过多路径传输注入式实验,验证了算法的有效性。
Abstract
Usually, the quality of signal will decrease in the multipath signal transmission of high rate modulated signals. In this paper, time reversal arithmetic for multipath signal transmission is researched. According to the known multipath transmission function, by transmitting the time reversal signal, the required signal will focus on the receiver location, thus S/N ratio of signal can be improved, waveform can be optimized, and code error rate can also be reduced, which can mitigate the influence of multipath transmission. This arithmetic is proved to be effective by the injection test.
郝晓军, 陈翔, 闫京海. 时间反演技术在通信多路径传输中的应用[J]. 强激光与粒子束, 2015, 27(10): 103252. Hao Xiaojun, Chen Xiang, Yan Jinghai. Application of time reversal technique in multipath signal transmission[J]. High Power Laser and Particle Beams, 2015, 27(10): 103252.