多码DS/CDMA传输自适应系统的序列优化  

Multicode DS/CDMA Systems Transmitter Adaptation Based on Optimal Sequence

作　　者：何先刚[1] 赵军丰[1] 聂永萍[1] 张忠培[2] 

机构地区：[1]重庆邮电学院,重庆400065 [2]清华大学电子工程系,北京100084

出　　处：《重庆邮电学院学报（自然科学版）》2003年第2期45-49,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目 ( 6983 10 3 0 );重庆邮电学院科技基金资助项目 ( A2 0 0 1- 3 3 )

摘　　要：为了优化多码 DS/ CDMA系统性能 ,提出了一种自适应序列优化及功率控制方法 ,通过优化系统扩频码设计 ,使系统能有效地克服多径多址干扰 ,降低系统传输功率。此方法中 ,为提高接收端用户的信号干扰噪声比 ( SINR) ,提出了一种快速收敛的优化序列设计算法 ,通过优化发送扩频序列和接收解扩序列 ,降低了多址干扰 ,提高了多径分集增益 ;通过调整发射功率 ,使接收端达到设定服务质量要求 ,是一种有效的多码 DS/To improve the performance of multicode DS/CDMA, an adaptation method of optimal sequence and power control is disussed in this paper, which can suppress multi-path and multi-access interference. In this method,a particular algorithm with high convergence and low calculation complexity is used.With the algorithm,good spread sequences and receiver despread sequences are obtained, which can maximize signal- interference-noise-rate(SINR), suppress multi-access interference, and get the multi-path diversity gain. Based on the optimal sequence and allocation transmitter power, the receiver SINR is improved and reaches the expected SINR, which satisfies the quality of servers in the system.

关 键 词：多码DS/CDMA 传输自适应 序列优化 功率控制 信号干扰噪声比 第三代移动通信 

分 类 号：TN929.533[电子电信—通信与信息系统]