并行组合扩频系统中Gold序列代数和相关性及优选  

Correlation of Superposition Gold Sequences and Optimized Sequences Selection in Parallel Combinatory Spread Spectrum System

作　　者：刘明夺[1] 郭黎利[1] 姜晓斐[2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001 [2]中国电子科技集团第54研究所微波散射部,石家庄050001

出　　处：《北京邮电大学学报》2013年第4期33-38,共6页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61271263)

摘　　要：提出了序列代数和相关特性的概念,采用此概念对Gold序列的代数和序列相关性进行了分析,并给出了一种Gold序列的优选方法.针对Gold代数和序列非零时延处互相关函数具有多值且峰值较大的特点,从减小序列异步时序列代数和互相关峰值干扰的角度出发,优选出具有较小代数和互相关特征峰值序列.结果表明,在并行组合扩频系统序列异步的高白信道下,采用优选Gold序列集的系统误码率要低于未优选Gold序列集的系统误码率.A concept concerning correlation properties of superposition sequences is proposed. And so, an optimized selection method is proposed based on analysis of correlation properties of superposition se- quences for Gold sequences. According to the property of the relatively large multiple peaks of the cross- correlation functions, the smaller cross-correlation characteristic peak values of superposition sequences are optimized to decrease mutual interference of superposition sequences in asynchronous system. It is shown that the bit error probability is lower than that of non-optimized selection Gold sequences in addi- tive white Gaussian noise channel of the asynchronous system.

关 键 词：并行组合扩频通信系统 相关性 GOLD序列 序列优选 

分 类 号：TN914.2[电子电信—通信与信息系统]