摘要
为了减小正交频分复用(OFDM)信号的峰值一平均值功率之比(PAPR),本文利用互补序列和Reed-Muller码的关系,详细提出了一种构造互补序列的分组编码方法的具体实现方案,分析了其在AWGN和选频衰落信道中的性能,并做了相应的仿真。仿真结果表明,编码后每个OFDM信号的最大PAPR不超过3dB;采用该编码方法的OFDM在AWGN中当信噪比不到11dB时就可以实现BER为10-6;在衰落信道中如果采用软判决译码,则当信噪比达到20dB左右时可以实现BER为10-3。
To reduce the peak-to-average power ratio (PAPR) of OFDM signals, detailed complementary sequences based blocking coding scheme is presented. The system performances with such a coding scheme, both in AWGN channels and in frequency-selective fading channels, are analyzed and simulated. It is shown from the simulation results that the PAPR of so-coded OFDM signals is less than 3 dB. With such a coding scheme, a BER of 10-6 can be achieved when SNR is around 11 dB in AWGN channels. And in frequency selective fading channels, a BER of 10-3 can be achieved when SNR is around 20 dB.
出处
《电路与系统学报》
CSCD
2003年第1期7-11,共5页
Journal of Circuits and Systems
基金
国家863计划资助项目(2001AA121031)
