Correction of the Algorithm of Joint Estimation of SIMO Channels and Transmitting Symbols by Oblique Projections
海梅 颜 · Hans Journal of Wireless Communications · 2012
本文分析了基于斜投影算子的单输入多输出(SIMO)有限冲激响应(FIR)滤波器信道中信道与发射符号联合盲估计算法原理，改正了算法中存在的两处错误，即斜投影算子的计算公式和Q矩阵的构造公式，并采用Matlab软件仿真实现了该算法。仿真实验表明，改正的算法能同时给出信道矩阵与发射符号的正确估计，算法估计量的MSE随SNR的增加而单调减小，验证了改正后算法的正确性和有效性。 The principle of the algorithm of joint estimation of single-input-multi-output (SIMO) channels and transmitting symbols by oblique projections is analyzed. Corrections of computation of the oblique projectors and construction of a Q matrix in the algorithm are performed. Simulation based on Matlab software is carried out to realize the algorithm. The experimental results show that the corrected algorithm can give right estimations of the channel matrix and the symbols, and the mean square error (MSE) of the two estimators decrease with the increase of the signal to noise ratio (SNR). Hence, the correctness and the validity of the corrected algorithm are verified.