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降低MC-CDMA系统峰均功率比的SLM改进方法

Modified SLM Algorithm for PAPR Reduction in MC-CDMA System
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摘要 多载波码分多址(MC-CDMA)被广泛认为是未来4G通信的核心技术,但MC-CDMA信号的高峰均功率比(PAPR)会引起非线性失真并导致误码率性能恶化。针对MC-CDMA系统的高峰均功率比的问题,对传统的选择性映射(SLM)算法进行改进。提出一种自适应选择复用帧数的选择性映射系统,在误码率满足一定条件的基础上,通过自适应选择复用帧数的算法选择出最适合系统的复用帧数的个数,使系统在复杂度较低的基础上仍能有效的降低信号的峰均功率比。仿真结果验证其有效性。 Multicarrier code division multiple access（MC-CDMA） is considered as the core technology of the future 4G wireless communications,but the high peak-to-average power ratio（PAPR） of MC-CDMA signals would result in nonlinear distortion and degradation of BER performance.For this problem a modified method based on the traditional Selected Mapping（SLM） is proposed,and a SLM system with adaptive selection of copy-frame number is also presented.Based on certain condition of BER,the copy-frame number most suitable for the system is selected through the adaptive selection algorithm for copy-frame number,thus the system could effectively lower PAPR in fairly low complexity.Simulation results indicate the effectiveness of this proposed adaptive selection system.
作者 罗靖宇 陈迅
机构地区 淮南师范学院
出处 《通信技术》 2011年第5期138-139,142,共3页 Communications Technology
基金 淮南师范学院2010年度科研基金项目(NO.2010QNL14)
关键词 峰均功率比 选择性映射 自适应选择 复用帧数 PAPR SLM adaptive selection copy-frame number
分类号 TN914.42 [电子电信—通信与信息系统]
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参考文献8

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通信技术
2011年 第5期

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