摘要
针对正交频分复用(OFDM)系统具有高峰均比(PAPR)的问题,提出了一种降低系统峰均比的联合算法——选择联合算法。该联合算法先将经过串并转换后的调制数据分成若干子块,再把每个子块送入算法选择器,依次判断后,最后对每个子块采用与之对应的算法。仿真结果表明,该联合算法可以有效降低PAPR 4 d B左右,在与分组数相同的PTS算法比较,当调制数少时,PAPR改善程度会优于PTS算法,当调制数大时,PAPR改善程度与PTS算法相当。
A joint algorithm called selection joint algorithm which can reduce system Peak-to-Average Power Ratio （PARA） is proposed for overcoming the shortcoming of high PARA in Orthogonal Frequency Division Multiplexing （OFDM） system. First, the deserialized modulation data are grouped by the joint algorithm and sent to the algorithm selector; then the selector decides which algorithn is appropriate for each group successively.The simulation results show that this joint algorithm can effectively reduce about 4 dB of system PAPR.Compared with the PTS algorithm with same amount of groups, the joint algorithm is better than PTS algorithm when there are few modulation data;and the two algorithms share on a fifty-fifty basis when there are much modulation data.
出处
《无线电通信技术》
2015年第2期29-31,共3页
Radio Communications Technology
关键词
正交频分复用
峰均比
选择联合算法
算法选择器
Orthogonal Frequency Division Multiplexing （ OFDM ）
Peak-to-Average Power Ratio （PAPR）
selection joint algorithm
algorithm selector
