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基于查表的开环MPM预失真器

杨友福 张其善 刘建伟 修春娣

杨友福, 张其善, 刘建伟, 等 . 基于查表的开环MPM预失真器[J]. 北京航空航天大学学报, 2012, (3): 400-404.
引用本文: 杨友福, 张其善, 刘建伟, 等 . 基于查表的开环MPM预失真器[J]. 北京航空航天大学学报, 2012, (3): 400-404.
Yang Youfu, Zhang Qishan, Liu Jianwei, et al. Open-loop memory polynomial pre-distorter based on look-up table[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, (3): 400-404. (in Chinese)
Citation: Yang Youfu, Zhang Qishan, Liu Jianwei, et al. Open-loop memory polynomial pre-distorter based on look-up table[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, (3): 400-404. (in Chinese)

基于查表的开环MPM预失真器

基金项目: 国家863计划资助项目(2009AA01Z418); 中央高校基本科研业务费专项资金资助项目(YWF1002009); 中国博士后科学基金资助项目(20090460192)
详细信息
  • 中图分类号: TN 914.3

Open-loop memory polynomial pre-distorter based on look-up table

  • 摘要: 提出了一种基于查表的开环记忆多项式模型(MPM,Memory Polynomial Model)预失真器.从MPM预失真器系数估计和执行信号预失真处理两方面加以考虑.首先,利用预失真器和高功率放大器(HPA,High Power Amplifier)传输特性的互补性,由采集到的HPA输入、输出基带数据进行单次最小二乘估计得到MPM预失真器的系数,避免了以往递归结构的收敛性和计算量大等问题.然后,利用MPM预失真器的特点,建立了基于输入信号强度索引的一维向量表,通过查表实现MPM预失真器的幂次累加项,极大地减少了实现预失真器所需的计算量及硬件开销.仿真显示,采用提出的预失真器可以有效补偿HPA对信号的记忆非线性失真,有效带宽内获得了近20 dB的功率改善,也显著改善了系统误码性能.

     

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出版历程
  • 收稿日期:  2010-11-24
  • 网络出版日期:  2012-03-30

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