摘要
多载波调制技术由于具有极高的频谱利用率和有效的抗码间干扰性能,特别适用于无线环境下的高速传输,被普遍认为是下一代无线通信系统必不可少的技术。但是它的一个主要缺点是峰均功率比(PAPR)特别高,会给系统设计带来很多问题。讨论了高峰均功率比产生的原因及其对多载波通信性能影响,分析了几种抑制高峰均比的方法和其特点。研究了选择性映射降低峰均功率比算法及其改进方法,探讨了多载波系统PAPR的性能。
Multicarriers modulation is efficiently use of radio spectrum and resisitance to inter-symbol interference. It is specially sutiable for high-speed wireless communiction, and is considered as necessery technique for the next generation communition system. But high peak-to-average power ratio（PAPR） of the transmitted signal is a major drawback of muticarriers modulfion system. A high PAPR may cause many problems in system design. In this paper, The causes of PAPR and the influ- ence of PAPR on muticarrers modulation is discussed. The characteristic of serials reducing the PA- PR of muticarrers modulaion signal is analyzed. Selected mapping（SLM） technique that is one of the promising PAPR reducing techniques for muticarrers modulation system is researched and in the same time the performance of selected mapping＇PAPR is discussed .
出处
《无线通信技术》
2008年第3期5-9,13,共6页
Wireless Communication Technology
关键词
多载波调制
选择性映射
峰均功率比
multicarrers modulation
selected mapping
peak-to-average ratio
