利用免疫遗传PTS算法降低OFDM系统PAPR  

Reducing the OFDM peak-to-average power ratio with IG-PTS algorithm

作　　者：刘成德[1] 庞伟正[1] 王东辉[1] 胥恒 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2007年第7期38-41,共4页Applied Science and Technology

摘　　要：提出一种免疫遗传PTS(partial transmit sequences)算法来降低OFDM系统PAPR(peak-to-average power ratio).PTS算法大大降低OFDM系统中高PAPR出现的概率,并且不会带来性能损失.PTS算法的关键是权因子的选择.将免疫遗传算法应用在PTS算法的权因子选择上,不仅简化了计算复杂度,同时对权因子进行了优化,仿真结果验证了新方法的有效性.A novel IG PTS algorithm is proposed to reduce the peak-to-average power ratio. PTS algorithm greatly reduces high probability of occurrence of PAPR in OFDM system and doesn＇ t influence other performances. The key of PTS algorithm is the choice of weight factors. In this paper, IGA is applied to choose PTS weight factors. IG PTS algorithm not only simplifies the complexity of operation but also optimizes the weight factor. The computer simulation verified the efficiency of the new method.

关 键 词：峰均功率比 正交频分复用 部分传输序列 免疫遗传 

分 类 号：TN911.7[电子电信—通信与信息系统]