基于QPSK系统的盲均衡TXK算法

Blind Equalization TXK Algorithm Based on QPSK System

由于实际数字信息通过的信道是带限、非理想信道 ,将引起符号间干扰 ,如果不加补偿 ,会产生高的差错率 .均衡器是为补偿这些信道失真而设计的 .提出了基于四相相移键控系统 (QPSK)的TXK算法 .该算法能够有效地适用于实单输入多输出信道 (SIMO) ,其思想是利用信道Toeplitz估计复矩阵 ^H的实部估计发送序列 .通过基于经典文献信道仿真结果表明 。

Because the channels for the actual digital communications signals are band limited and non ideal, symbol interferences will be caused, leading to high error rates if left uncompensated. The equalizers have been designed to compensate for the channel distortions. This article brings forward further the TXK Algorithm based on QPSK system. This algorithm can be applied to real SIMO channels. The principle is to estimate the transmission sequences by the evaluation of the real part of the channels. Simulation results indicate that this method of TXK has the better ability to equalize blind channels and to detect blind sequence in QPSK system.