欢迎访问《电讯技术》编辑部网站！

首页 期刊简介编委会征稿启事出版道德声明审稿流程读者订阅论文查重联系我们English

引用本文：

胡茂凯,陈西宏,薛伦生,等.扩频码PSO优化分配降低MC-CDMA信号峰均比[J].电讯技术，2013，53（2）： - . [点击复制]
HU Mao-kai,CHEN Xi-hong,XUE Lun-sheng,et al.PSO-based spreading code allocation for PAPR reduction of MC-CDMA signal[J].，2013，53（2）： - . [点击复制]

本文已被：浏览 2148次下载 2876次	码上扫一扫！
扩频码PSO优化分配降低MC-CDMA信号峰均比
胡茂凯,陈西宏,薛伦生,黄荣华
0 字体:加大+\|默认\|缩小-
(空军工程大学防空反导学院，西安 710051;解放军第95100部队，广州 510000)

摘要:

高峰均比(PAPR)是多载波码分多址(MCCDMA)技术应用中亟待解决的关键问题。对于采用Wa lshHadamard(WH) 扩频码的系统来说，优化用户扩频码的分配方案可降低系统的PAPR，但最优扩频码分配方法运算复杂度太高。为此，采用具有优良迭代寻优能力的粒子群优化算法（PSO）来降低算法的复杂度。改进算法将最优分配方案的高维搜索问题转化为粒子群迭代寻优过程。分析比较和仿真结果表明，与最优算法相比，改进算法在降低PAPR性能方面有05～1.5 dB的性能损失，而复杂度远小于最优算法，是一种简单实用的峰均比降低方法。

关键词: 多载波码分多址扩频码分配峰均比粒子群优化算法

DOI：

基金项目:

PSO-based spreading code allocation for PAPR reduction of MC-CDMA signal

HU Mao-kai,CHEN Xi-hong,XUE Lun-sheng,HUANG Rong-hua

()

Abstract:

The high peaktoaverage power ratio(PAPR) of Multicarrier Code Division Mult iple Access(MCCDMA) is a key factor to be solved. In MCCDMA system us ing WalshHadamard(WH) spreading codes, the spreading code allocation is relate d to the PAPR and a reasonable allocation strategy can reduce signal PAPR. To reduce the high com plexity of the optimal allocation method, particle swarm optimization(PSO) is in troduced for seeking the optimum code allocation. Analysis and simulation results sho w that the proposed suboptimal method has a small performance loss (0.5～1.5 dB) in reducing PAPR. But the suboptimal method also has very low computational complexity and is suitable for practical system.

Key words: MC CDMA spread code allocation PAPR particle swarm optimization(PSO)