基于Logistic序列的UWB系统Rake接收机性能分析

Performance Analysis for Rake Reciever of UWB Radio System Based on Logistic Sequences

依据混沌序列码元丰富,抗干扰能力强,优良的相关特性和白噪声统计特性,采用改进型Logistic映射迭代产生的混沌序列作为扩频序列,提出了多径信道下混沌UWB通信系统。针对该系统Rake接收机的性能进行分析,重点仿真了不同信道、不同支路、不同扩频码情况下的Rake接收机性能,由分析和仿真可知,系统性能得到了改善,抗干扰能力增强。

Because chaotic sequence has rich code elements and good capability of anti-jamming,the properties of good correlation and white noise statistician,the chaotic sequences are created by iteration methods based on advanced Logistic-map,and they are applied in the UWB system under multipath channel model,then the performance of the system uses Rake receiver is analyzed.The performance of Rake receiver under different channels and different spread-spectrum sequence is discussed.The results indicate that the chaotic sequence can improve the performance of UWB system,and the capability of anti-jamming is good.