基于扰码降低OFDM峰均比算法的研究  

Research on the algorithm to Reduce PAPR of OFDM system Using Scrambling Code

作　　者：赵俊飞[1] 葛文萍[1] 张大帅[1] 车全江 

机构地区：[1]新疆大学信息科学与工程学院

出　　处：《激光杂志》2014年第11期84-86,共3页Laser Journal

基　　金：新疆自治区自然科学基金项目(20122012211A013)

摘　　要：正交频分复用(OFDM)系统因具有频谱利用率高、抗多径衰落能力强等优点成为当前研究的热点,但过高的峰均功率比(PAPR)限制了其发展与应用。本文通过对现有的PAPR抑制技术优缺点进行比较分析,提出了在信源序列中插入扰码和自适应限幅技术相联合的方法。在PAPR抑制中扰码具有与选择性映射法同样的效果,但扰码不需要传输边带信息来辅助解调。MATLAB仿真结果表明,该方法不仅能够有效的改善PAPR性能,而且具有较低的计算复杂度和误码率,有较好的实际应用价值。Because of high spectrum efficiency and strong ability to resist multipath fading,orthogonal frequency division multiplexing（OFDM） system has been one of research hot spots at present.But the high peak-to-average power ratio（PAPR） limits its development and application.In this paper,the advantages and disadvantages of the existing PAPR reduction techniques are analyzed and compared firstly,and then a novel scheme that combines joining scrambling code in the source sequence with adaptive clipping technology is proposed.Scrambler code is the equivalent of selective mapping about reducing PAPR,but it does not need to transmit sideband information to assist in the demodulation.The simulation results show that the scheme not only can well reduce PAPR effectively,but also can reduce the computational complexity and the error rate.This scheme has good potential application value.

关 键 词：正交频分复用 峰均功率比 扰码 自适应限幅 

分 类 号：TN911.72[电子电信—通信与信息系统]