信号畸变SLM算法降低OFDM系统PAPR  

Reducing the OFDM peak-to-average power ratio with aberration selective mapping algorithm

作　　者：刘成德[1] 庞伟正[1] 王东辉[1] 李杰海 

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6期15-17,共3页Applied Science and Technology

摘　　要：提出一种信号畸变SLM(selective mapping)算法来降低OFDM系统PAPR(peak-to-average power ratio).传统SLM算法大大降低OFDM系统中高PAPR出现的概率,但并不能完全限制高PAPR信号的出现.信号畸变SLM算法在保持其余信号不变基础上,对高PAPR信号进行畸变,将系统PAPR控制在期望的范围之内.经过SLM算法处理后大大降低了高PAPR信号出现的概率,所以对高PAPR信号进行畸变在很好地控制了OFDM系统PAPR的同时,并不会影响系统其余性能.仿真结果验证了新方法的有效性.A novel signal distortion SLM algorithm is proposed to reduce the peak -to- average power ration（ PA- PR） in OFDM system. Traditional SLM greatly reduces the probability of OFDM signal with great peak - to - average power ratio, but it cant completely restrain the appearance of such a signal. The signal distortion SLM algorithm controls the PAPR within expected scope by only distorting the signals with great PAPR and preserving other signals. The algorithm of signal distortion SLM can control the PAPR very well and doesnt influence the other performances of the system, because SLM algorithm considerably reduces the probability with which high PAPR signals occur. The computer simulation verifies the efficiency of the new method.

关 键 词：峰均功率比 正交频分复用 选择映射 畸变 

分 类 号：TN911.7[电子电信—通信与信息系统]