用于减小OFDM信号PMEPR的Golay互补序列的编码和译码算法  

Encoding and Decoding Algorithm of Golay Complementary Sequences for PMEPR Reduction in OFDM Signals

作　　者：颜彪[1] 许宗泽[2] 邹国良[3] 

机构地区：[1]扬州大学信息工程学院,扬州225009 [2]南京航空航天大学信息科学与技术学院,南京210016 [3]上海大学通信与信息工程学院,上海200072

出　　处：《上海大学学报（自然科学版）》2005年第1期4-7,共4页Journal of Shanghai University:Natural Science Edition

基　　金：江苏省自然科学基金资助项目 (BK2 0 0 1 0 3 6 )

摘　　要：基于Golay互补序列和Reed Muller码的关系,提出了一种把输入信息序列编成Golay互补序列的分组编码算法,该Golay序列同时还具有Reed Muller码的纠错能力.此外,还利用该编码算法对一个16子载波的8PSK OFDM系统的PMEPR特性进行了仿真,并把它与使用普通Reed Muller码字得到的PMEPR特性作了对比,结果表明由该编码算法获得的PMEPR不超过3dB.对于所提出的编码方案,研究了基于快速哈达玛变换的一种高效译码算法.最后根据编码和译码算法,对OFDM系统在AWGN信道下的误比特率特性进行了仿真,仿真结果和理论分析趋于一致.Based on the relationship between the Golay complementary sequences and the Reed-Muller codes, a block encoding algorithm with which input sequences are encoded into Golay complementary sequences is proposed. The Golay complementary sequences also have the error correction capability of Reed-Muller codes. Simulation of PMEPR characteristic for a 8PSK-OFDM system with 16 subcarriers is performed by using the encoding algorithm, which is compared with that obtained by using common Reed-Muller codewords. Simulation results indicate that PMEPR gained by using the encoding algorithm is no more than 3 dB. For the proposed encoding scheme, an efficient decoding algorithm based on fast Hadamard transform (FHT) is also investigated. Simulation of the BER of an OFDM system in an AWGN channel is carried out according to both the encoding and decoding algorithms. Simulation results are in agreement with theoretic analysis.

关 键 词：正交频分复用 GOLAY互补序列 Reed-Muller(RM) 峰值平均包络功率比 

分 类 号：TN911.21[电子电信—通信与信息系统] TN911.22[电子电信—信息与通信工程]