平坦慢衰落信道下基于HOS的PSK调制盲信道估计
发布时间：2018-07-14 20:51
【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 d B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 estimation algorithm for fading coefficients of MPSK-modulated channels based on HOSS-high-order statistics is proposed. For the flat slow fading channel model, the high order statistic characteristics of MPSK modulation symbols are first analyzed, and it is proved that the value of M power symbols of MPSK modulation symbols is unique, but when 1 鈮，
本文编号：2122910
[Abstract]:A blind estimation algorithm for fading coefficients of MPSK-modulated channels based on HOSS-high-order statistics is proposed. For the flat slow fading channel model, the high order statistic characteristics of MPSK modulation symbols are first analyzed, and it is proved that the value of M power symbols of MPSK modulation symbols is unique, but when 1 鈮，
本文编号：2122910
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