平坦慢衰落信道下基于HOS的PSK调制盲信道估计

李啸天; 雷菁; 刘伟; 李艳斌; 张润生

doi:10.11959/j.issn.1000-436x.2015110

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平坦慢衰落信道下基于HOS的PSK调制盲信道估计

学术论文 | 更新时间：2024-06-05

- 平坦慢衰落信道下基于HOS的PSK调制盲信道估计
- High-order statistics based blind channel estimation for PSK modulation in flat and slow fading channels
- 通信学报 2015年36卷第5期页码：140-147
- 作者机构：
  
  1. 中国电子科技集团公司第五十四研究所，河北石家庄 050081
  2. 国防科学技术大学电子科学与工程学院，湖南长沙 410073
- 作者简介：
  
  [ "李啸天（1986-），男，河北石家庄人，中国电子科技集团公司第五十四研究所博士生，主要研究方向为通信信号处理。" ]
  [ "雷菁（1968-），女，陕西西安人，博士，国防科学技术大学教授、硕士生导师，主要研究方向为信息论与编码、物理层安全等。" ]
  [ "刘伟（1979-），男，湖南邵东人，博士，国防科学技术大学讲师，主要研究方向为MIMO-OFDM技术、空时编码、物理层安全。" ]
  [ "李艳斌（1966-），男，河北石家庄人，博士，中国电子科技集团公司研究员、博士生导师，主要研究方向为电子对抗总体技术。" ]
  [ "张润生（1984-），男，河北保定人，博士，中国电子科技集团公司第五十四研究所工程师，主要研究方向为通信信号处理。" ]
- 基金信息：
  
  国家自然科学基金资助项目(61372098);国家自然科学基金资助项目(61101098)
- DOI：10.11959/j.issn.1000-436x.2015110
  中图分类号： TN911
- 网络出版日期：2015-05，
  
  纸质出版日期：2015-05-25
- 稿件说明：
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李啸天, 雷菁, 刘伟, 等. 平坦慢衰落信道下基于HOS的PSK调制盲信道估计[J]. 通信学报, 2015,36(5):140-147.

IXiao-tian L, EIJing L, LIUWei ,, et al. High-order statistics based blind channel estimation for PSK modulation in flat and slow fading channels[J]. Journal on communications, 2015, 36(5): 140-147.
李啸天, 雷菁, 刘伟, 等. 平坦慢衰落信道下基于HOS的PSK调制盲信道估计[J]. 通信学报, 2015,36(5):140-147. DOI： 10.11959/j.issn.1000-436x.2015110.

IXiao-tian L, EIJing L, LIUWei ,, et al. High-order statistics based blind channel estimation for PSK modulation in flat and slow fading channels[J]. Journal on communications, 2015, 36(5): 140-147. DOI： 10.11959/j.issn.1000-436x.2015110.

摘要

提出一种基于符号高阶统计量（HOS

high-order statistics）的MPSK调制信道衰落系数盲估计算法。针对平坦慢衰落信道模型，首先分析了MPSK调制符号高阶统计量特征，证明了MPSK调制符号的M次方符号的值是唯一的，而当1≤M′＜M时，调制符号的M＇次方符号在复平面上是对称分布的；之后利用此特征推导出MPSK调制阶数、初始相位和衰落系数估计算法。仿真实验表明，信噪比高于12 dB条件下，HOS算法估计性能与目前平坦慢衰落信道盲估计的主流方法Lloyd-Max算法相同，而算法复杂度为Lloyd-Max算法的1/50，并且在接收样本符号较少的条件下HOS算法的均方误差曲线收敛于最小二乘估计理论下界。

Abstract

A blind channel estimator based on high-order statistics (HOS) of PSK constellations was proposed.For flat and slow fading channels

firstly

the high-order statistics of PSK constellations with different alphabet size M was ana-lyzed.The M

power symbols of MPSK constellations are same

whereas the M

power symbols are symmetrically dis-tributed on the complex plane when 1≤M′＜M.Secondly

the estimation algorithms of alphabet size M

initial phase and fading coefficient were introduced based on the characteristics above.Finally

simulation results show that when SNR＞12 dB

the proposed algorithm has the same estimation performance as the optimal Lloyd-Max algorithm

while the complexity is only 1/50 of Lloyd-Max algorithm.Moreover

the proposed algorithm's mean-square error curve converges remarkably to the least squares (LS) bound on the condition of less

received symbols.

关键词

Keywords

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