BLOCK CODING SCHEME FOR REDUCING PAPR IN OFDM SYSTEMS WITH LARGE NUMBER OF SUBCARRIERS  

作　　者：JiangTao ZhuGuangxi ZhengJianbin 

机构地区：[1]DeptofElectron.＆Info.Eng.,HuazhongUniversityofScienceandTechnology,Wuhan430074

出　　处：《Journal of Electronics(China)》2004年第6期482-489,共8页电子科学学刊（英文版）

基　　金：Supported in part by the National 863 program of China(No.2001AA123014)

摘　　要：The major drawback in Orthogonal Frequency Division Multiplexing (OFDM) system is due to the high Peak-to-Average Power Ratio (PAPR), so the performance of the system is significantly degraded by the nonlinearity of a High Power Amplifier (HPA) in the transmitter.In order to mitigate distortion, a block coding scheme for reducing PAPR in OFDM systems with large number of subcarriers based on complementary sequences and predistortion is proposed,which is capable of both error correction and PAPR reduction. Computer simulation results show that the proposed scheme significantly improves Bit Error Rate(BER) performance as compared to an uncoded system when an HPA is employed or a coded system without predistortion.The major drawback in Orthogonal Frequency Division Multiplexing (OFDM) system is due to the high Peak-to-Average Power Ratio (PAPR), so the performance of the system is significantly degraded by the nonlinearity of a High Power Amplifier (HPA) in the transmitter. In order to mitigate distortion, a block coding scheme for reducing PAPR in OFDM systems with large number of subcarriers based on complementary sequences and predistortion is proposed, which is capable of both error correction and PAPR reduction. Computer simulation results show that the proposed scheme significantly improves Bit Error Rate(BER) performance as compared to an uncoded system when an HPA is employed or a coded system without predistortion.

关 键 词：Block coding Complementary sequence Peak-to-Average Power Ratio (PAPR) PREDISTORTION Orthogonal Frequency Division Multiplexing(OFDM) 

分 类 号：TN929[电子电信—通信与信息系统] TN915[电子电信—信息与通信工程]