多用户时分双工UWB通信系统的性能改进
Performance Enhancement of Multiuser Time Reversal UWB Communication System
摘要：
超宽带通信是室内传播信道的一个新的研究领域。超宽带系统中的时间延迟（TR）通信在改善系统性能方面已显示出良好的效果。在多用户环境中，由于不同用户之间的干扰，系统性能显著下降。TR由于其空间聚焦特性，减少了多用户干扰。通过对TR滤波器的改进，进一步提高了多用户TR通信系统的性能。本文利用简单的TR滤波器和一种改进的带循环移位的TR滤波器研究了超宽带通信中的多用户TR。分析了TR中循环移位的概念。此后，测量典型室内实验室环境的信道脉冲响应（CIR）。测量的CIR被用来分析接收信号的峰值功率和信号干扰比（SIR），在多用户环境中执行和不执行循环移位操作。
英文摘要：
UWB communication is a recent research area for indoor propagation channels. Time Reversal (TR) communication in UWB has shown promising results for improving the system performance. In multiuser environment, the system performance is significantly degraded due to the interference among different users. TR reduces the interference caused by multiusers due to its spatial focusing property. The performance of a multiuser TR communication system is further improved if the TR filter is modified. In this paper, multiuser TR in UWB communication is investigated using simple TR filter and a modified TR filter with circular shift operation. The concept of circular shift in TR is analytically studied. Thereafter, the channel impulse responses (CIR) of a typical indoor laboratory environment are measured. The measured CIRs are used to analyze the received signal peak power and signal to interference ratio (SIR) with and without performing the circular shift operation in a multiuser environment.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
