基于时间反演的无线通信系统仿真及探测信号选择

为改善无线通信系统抗干扰性能，将目前广泛应用于水声通信、超声波探测等领域的 时间反演技术移植至无线通信系统，在介绍基本原理的基础上建立了基于被动式时间反转镜 的单阵元无线通信系统模型，通过理论分析讨论了系统聚焦增益，通过计算机仿真研究了收 发信号的波形特点、分析论证了三种典型探测信号对接收波形的影响，并得出了相关结论。 仿真结果表明，给定信道条件下，系统性能主要取决于探测信号的选择。基于仿真结果和分 析，对探测信号的选择给出了更清晰的一般性原则，为实际通信系统性能的提高提供了科学 依据。

Simulation of a wireless communication system based on time reversal processing and pilot signal choosing

To enhance the anti-interference capability of a wireless communicatio n system, Time Reversal (TR) technology which has been widely used in fields suc h as underwater acoustic and ultrasonic defectoscope is transplanted to a wirele ss communication system. On the basis of discussing the principle of Time Revers al Mirror (PTRM), a wireless communication model employing the single sensor pas sive time reversal mirror (PTRM) is constructed as well as the focusing gain of the model is calculated mathematically. Both the waveforms of transmitted signal s and those of the received signals are compared and studied by computer simulat ions in which 3 typical pilot signals are employed and their different effects o n received waveforms are also analyzed in detail. Simulation results show that, given certain communication channel conditions, system performance depends heavi ly on pilot signal.According to the simulation results and analysis, this paper proposes clearer general principles for pilot signal choosing, which may provide helpful and scientific support for the performance enhancement of a practical c ommunication system.