超混沌序列对DS-UWB多址性能的改善  

Improvement on Multiple Access Performance in DS-UWB by Using Hyperchaotic Sequence

作　　者：何海莲[1] 王光义[1] 

机构地区：[1]杭州电子科技大学电子信息学院,浙江杭州310018

出　　处：《通信技术》2009年第1期36-38,共3页Communications Technology

摘　　要：利用Rssler超混沌系统构造了一种新的超混沌序列,分析了序列的相关特性,并将其应用于直接序列超宽带(DS-UWB)系统中,以提高它的误码性能。建立了DS-UWB通信系统的模型,以超混沌序列作地址码对高斯白噪声信道中多用户DS-UWB系统误码率进行了分析,并将其与m序列作地址码时的相应性能进行了比较。由分析和仿真可知,构造的新的超混沌序列能较好地改善DS-UWB的多址性能。In this paper, a new hyperchaotic sequence by using Rgssler hyperchaotic system is constructed and the correlation properties of the sequence analyzed. This sequence is applied in the direct sequence ultra-wideband （DS-UWB） systems, thus to enhance the performance of its bit error rate （BER）. The model of DS-UWB communication system with the Gaussian white noise channel is established for analyzing its bit error rate while taking the hyperchaotic sequence as its address code. The ana]ysis results are compared with the performances of communication system with the m sequence as its address code. The analysis and simulation indicate that the new hyperchaotic sequence can improve the performance of multiple accesses DS-UWB.

关 键 词：超宽带技术 超混沌序列 误码率 

分 类 号：TN929[电子电信—通信与信息系统]