摘要
基于小波变换的正交频分复用(WOFDM)系统存在较高的峰值平均功率比(PAPR),针对传统降低PAPR方法的高计算复杂度和低误码性能的问题,提出一种改进的部分传输序列(PTS)技术,并将其与μ律压扩进行联合处理。仿真结果表明,改进的PTS技术与传统方法相比,以牺牲少量的PAPR性能大大降低了系统的计算复杂度。经改进的PTS技术和μ律压扩联合处理,在计算复杂度不高的前提下,将WOFDM系统的PAPR值降低了4.7 dB,而误码性能仅损失1.4 dB。
Wavelet-based orthogonal frequency division multiplexing （WOFDM） system has the problem of high peak-to-average ratio（PAPR）. Aiming at the high computational complexity and low bit error （BER） performance of the traditional technique to reduce PAPR, a PAPR reduction algorithm using improved partial transmit sequence （PTS） technology and μ-law companding method is proposed in the paper. Simulation results show that the improved PTS technology greatly reduces the computational complexity with only a little PAPR performance lost compared to the traditional technology. Combining improved PTS technology with μ-law companding method, in the premise of low computational complexity, the PAPR value in WOFDM system reduces by 4.7 dB with only 1.4 dB BER lost.
出处
《电子技术应用》
北大核心
2017年第6期94-97,共4页
Application of Electronic Technique
基金
国家自然科学基金(61571244)
天津市科技计划项目(16YFZCSF00540)
