基于混沌扩频序列的超宽带通信系统多址性能  

Performance of UWB multiple-access communication system based on chaotic spread spectrum sequences

作　　者：薛龙[1] 万冬东[1] 蒋国平[1] 

机构地区：[1]南京邮电大学电子工程系,南京210003

出　　处：《东南大学学报（自然科学版）》2005年第A02期22-25,共4页Journal of Southeast University：Natural Science Edition

基　　金：江苏省高等学校青蓝工程计划资助项目(JS200407);江苏省高等学校自然科学基金重点资助项目(04KJA517092)

摘　　要：依据混沌序列的白噪声统计特性,较理想的自相关和互相关特性,且产生简单、码元丰富、抗干扰能力强等特性,极其适合作为扩频序列,提出了基于混沌扩频序列的UWB通信系统方案,对多址干扰和白噪声干扰进行了分析,得出了它的误码率公式.采用了改进型Logistic映射迭代形成的数字混沌序列作为扩频序列,在系统内用户数不同的条件下,分别进行了4组仿真实验,误码率的仿真结果和理论值一致,证明了理论分析的正确性,表明了系统强抗干扰能力.Because chaotic sequences have the properties of good correlation, simple generation anti rich code elements and they meet the demand of spread-spectrum sequence, good capability of anti-jamming, multipie-access communications system of multiple-access interference and based on chaotic spread spectrum sequences is presented. The performance white noise interference is analyzed and a novel analytic formula for calculating bit-error-rate is obtained. We do four experiments in the system with different users on the basis that the chaotic sequences are measurements through created by iteration methods based on advanced Logistic-map. The results verified by simulation system are similar to the theoretical analysis is prove that the theory results are precise, indicating that the capability of anti-jamming is good.

关 键 词：超宽带 直扩 混沌 

分 类 号：TN911[电子电信—通信与信息系统]