A variable time lag algorithm for the FIR equalizer

In linear equalization, time lag is an important parameter that significantly influences the performance. Only with the optimum time lag that minimizes the minimum-mean-square-error (MMSE), can we have best use of the available resources. Many designs, however, choose the time lag either based on pre-assumption of the channel or simply based on average experience. In this paper, we propose a novel variable time lag algorithm with the concept of pseudo fractional time lag. The proposed algorithm can converge to the optimum time lag in the mean and is verified by the numerical simulations provided in this paper.