基于星座图分割的有记忆数据预失真方法  

A data predistorter with memory based on constellation partition

作　　者：胡西阁[1] 吴增印[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《国外电子测量技术》2011年第12期22-24,55,共4页Foreign Electronic Measurement Technology

摘　　要：针对无线通信中有记忆功率放大器对16QAM信号造成的非线性失真,使用有记忆的数据预失真进行补偿,在此基础上提出一种基于星座图分割的有记忆数据预失真方法,可以大幅减少预失真值查找表的计算量和存储量,提高自适应收敛速度。仿真结果表明该方法能有效减小带内失真和补偿记忆效应,在误码率为10-4数量级时,相比于无记忆数据预失真,信噪比改善约2dB。To compensate for nonlinear distortions caused by power amplifier with memory for 16QAM signal in wireless communication,A data predistorter with memory based on constellation partition was proposed,which can dramatically decrease the size of Look-Up Table and converge at a faster speed.The result of computer simulation shows that the proposed method can effectively reduce in-band distortion and compensate the memory effects.When BER（Bit Error Rate） comes up to the leval of 10-4,Eb/N0 would improve about 2 dB,compared to data predistorter without memory.

关 键 词：功率放大器 16QAM 数据预失真 星座图分割 

分 类 号：TN927[电子电信—通信与信息系统]