發(fā)布時間：2018-07-14 20:51

【摘要】：提出一種基于符號高階統(tǒng)計量(HOS,high-order statistics)的MPSK調(diào)制信道衰落系數(shù)盲估計算法。針對平坦慢衰落信道模型,首先分析了MPSK調(diào)制符號高階統(tǒng)計量特征,證明了MPSK調(diào)制符號的M次方符號的值是唯一的,而當(dāng)1≤M′M時,調(diào)制符號的M′次方符號在復(fù)平面上是對稱分布的;之后利用此特征推導(dǎo)出MPSK調(diào)制階數(shù)、初始相位和衰落系數(shù)估計算法。仿真實驗表明,信噪比高于12 d B條件下,HOS算法估計性能與目前平坦慢衰落信道盲估計的主流方法 Lloyd-Max算法相同,而算法復(fù)雜度為Lloyd-Max算法的1/50,并且在接收樣本符號較少的條件下HOS算法的均方誤差曲線收斂于最小二乘估計理論下界。
[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，

本文編號：2122910