A Self Companding Transform to Reduce Peak-to-Average Power Ratio in OFDM Based WLANs
A high peak-to-average power ratio (PAPR) makes the orthogonal frequency division multiplexing (OFDM) based wireless local area lans (WLANs) sensitive to non-linear distortion in the transmission. The companding transform approach is a very attractive technique to reduce PAPR, but large PAPR reduction leads to a high bit-error rate (BER) by the available companding transform techniques. In this paper, we propose and analyze a new envelop equalized processing (EEP), which makes the amplitude of the OFDM signal constant. Based on the proposed EEP, a novel self companding transform (SCT) is constructed to reduce the PAPR of the orthogonal frequency division multiplexing signal. Simulation results show that the proposed SCT technique has a low bit error rate while achieving a significant reduction of PAPR, and outperforms the well-known clipping filtering(CF) scheme and the improved μ-law companding(ICT) technique substantially.
Guangliang Ren Huining Zhang Yilin Chang Hui Zhang
National key Laboratory of ISN Xidian University Xian Shaanxi 710071 China
国际会议
2006 International Conference on Communications,Circuits and Systems(第四届国际通信、电路与系统学术会议)
广西桂林
英文
1142-1146
2006-06-25（万方平台首次上网日期，不代表论文的发表时间）