降低OFDM系统的PAPR的联合算法  

Co-algorithm to reduce PAPR in OFDM systems and its performance analysis

作　　者：张振川[1] 杨明华[1] 

机构地区：[1]东北大学信息科学与工程学院,沈阳110004

出　　处：《吉林大学学报（工学版）》2009年第4期1105-1109,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：'863'国家高技术研究发展计划项目(2002AA784030)

摘　　要：针对正交频分复用(OFDM)技术具有较高的峰均功率比(PAPR)的缺点,在研究传统降低OFDM系统PAPR的技术的基础上,将具有局部优良特性的部分传输序列(PTS)技术和限幅滤波技术进行了改进,提出一种将信号在时域进行PTS处理,在频域进行迭代限幅滤波处理的联合算法。该联合算法在降低OFDM的PAPR的基础上实现两种算法性能上的优势互补。计算机仿真结果表明,联合算法可以在不影响系统误码率性能的基础上,在降低OFDM信号PAPR方面,比限幅滤波法、迭代PTS法均有1 dB以上的改善。To overcome the shortcoming of high Peak-to-Average Power Ratio （PAPR） in Orthogonal Frequency Division Multiplexing （OFDM） systems, traditional techniques to reduce PAPR in OFDM systems was investigated. Improvements were made on Partial Transmit Sequences （PTS） and clipping-filtering techniques. Then a colgorithm which integrates the improved PTS processing in time domain and repeated clipping-filtering processing in frequency domain was proposed. This coalgorithm possesses the advantages of both PTS and clipping-filtering techniques. Computer simulation was performed and results show that the co-algorithm can reduce the PAPR in OFDM systems without degrading the Bit-Error Ratio （BER）. At least 1 dB improvement was obtained by using this co-algorithm compared with using either PTS or clipping-filtering method alone.

关 键 词：信息处理技术 正交频分复用 峰均功率比 部分传输序列 迭代限幅滤波 

分 类 号：TN91[电子电信—通信与信息系统]