基于空间分集的TH-UWB系统性能分析

Performance analysis of the TH-UWB system based on spatial diversity

摘要:

为了提高UWB系统在低信噪比下的性能，利用IEEE 802.15.3a工作组建议的标准UWB室内信道模型，采用多个接收天线分析了二进制TH-PPM超宽带系统性能的改善。在理想功率控制下，分别采用不同数目的接收天线和不同SRake接收机选择路径数，对2PPM-TH-UWB系统性能进行了分析和仿真。仿真结果表明，随着天线数和选择路径数的增加，系统性能均明显提高，并且空间分集比路径分集对系统性能有更好的改善。

Abstract:

In order to improve the performance of the Ultra-Wideband(UWB) under the situation of low signal and noise ratio，by using the UWB indoor channel model proposed by IEEE 802.15.3a study group，the performance improvement of the binary pulse position modulation Time Hopping Ultra-Wideband (2PPM-TH UWB) systems is analyzed in the case of employing multiple receive antennas. Under ideal power control, the diversity performance of 2PPM-TH-UWB systems is evaluated for different numbers of antenna elements and selected multipaths. The simulation results indicate that the system property becomes better as the number of antenna elements and Rake fingers increases, and the effects of the spatial diversity upon improving system performance are better than that of the temporal diversity.