运用格状图支路转移规则和Viterbi算法实现数字信号盲估计

DIGITAL CHANNEL BLIND ESTIMATION USING VITERBI ALGORITHM AND THE BRANCH TRANSITION RULES OF TRELLIS

该文提出了一种新的离散数字信道盲估计算法,运用格状图中的一步支路转移规则,大大削减了最佳估计所要求的计算量。文中首先介绍了符合最大似然序列估计(MLSE)准则的信道最佳盲估计算法,然后阐述了运用格状图中的一步支路转移规则对格状图进行筛选的基本思想,接着详细介绍了本算法,最后通过数值仿真研究了本算法的性能。

A novel discrete-time digital channel blind estimation algorithm is proposed, which reduces the complexity of the optimal estimation considerably by using the one-step branch transition rules of trellis. In this paper, the optimal estimation algorithm based on the maximum likelihood sequence estimation is introduced first. Then the idea of selecting trellises based on the one-step branch transition rules in a trellis is explained. Following the presentation of the novel channel blind estimation algorithm, the performance of this algorithm is studied with computer simulation.