COFDM信号峰平比改善及系统实现  

PAPR reduction for COFDM with Golay coding scheme and system implementation

作　　者：李维英[1] 吕卓[1] 厉军伟[1] 蔡峰[1] 

机构地区：[1]西安电子科技大学综合业务网理论与关键技术国家重点实验室信息科学研究所宽带无线通信实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2006年第3期347-351,共5页Journal of Xidian University

基　　金：国家自然科学基金重大项目(60496316);国家863计划课题(2005AA123910)

摘　　要：依据互补编码法降低峰平比原理,研究了互补编码法算法.根据算法复杂性和实现可行性间的平衡度,提出一种新的编解码方法并给出详细的解码步骤;通过对陪集进行透明性选择,省掉了对冗余陪集的解调,降低了算法复杂度,提高了可实施性.在40 MHz中频和高斯白噪声信道下对该算法进行了性能仿真,结果表明其峰平比可有效限制在6 dB以内,且其误码性能有较大的改善.并在32子载波的实际OFDM系统下予以实现,实际结果和理论分析非常吻合.According to complementary sequence characteristics, we study the algorithm for PAPR reduction in OFDM systems with Golay complementary sequences which are constructed by the Reed-Muller codes. In terms of the balance between complexity and implementation, we propose a new decoding scheme, which makes selection in the cosets so as to reduce the complexity of decoding and satisfy the real- time requirement. Finally, the simulation results in the AWGN channels show that the proposed algorithrn can constrain PAPR within 6 dB and achieves satisfactory BER performance.

关 键 词：正交频分复用(OFDM) 峰平比(PAPR) 互补码 REED-MULLER码 

分 类 号：TN911.22[电子电信—通信与信息系统]