摘要
OFDM系统的峰均功率比过大是一个严重的问题。降低OFDM系统的峰均功率比中的选择性映射法(SLM)方法需传送边带信息,但边带信息传送需要严格的信道编码,增加了系统复杂性,占用了频带宽度。文中将传统的OFDM峰均功率比降低技术SLM方法加以改进并与限幅技术结合起来,所生成的新算法有效地弥补了传统SLM技术限制峰均功率比不足的问题,并且不用传输边带信息。仿真表明,该方法有良好的性能。
a serious problem of OFDMsystem is its high Peak-to-Average Power Ratio （PAPR）. This paper proposes a improved SLM technology, which is combined with clipping. This would make the system unnecessary to transmit the side information, thus the problem that the SLM could not effectively reduce the OFDM PAPR is solved, and the increase of data rates loss and system complexity avoided. The simulation shows that the proposed method is of excellent performance.
出处
《通信技术》
2008年第12期122-124,共3页
Communications Technology
关键词
正交频分复用
峰均功率比
选择性映射法
限幅
orthogonal frequency-division multiplexing
Peak-to-Average Power Ratio
Selected mapping
Clipping
