Time delay optimization of multiple channels MMSE equalization

The equalization of the multiple-channel system which can be obtained by fractionally spaced sampling is studied. Minimum mean square error (MMSE) equalizer for multiple channels was introduced, and it shows that there is a corresponding optimal time delay in each subchannel. The analysis to choosing the time delays gives the bound of the optimal time delay. The simulation results show that the performance of the MMSE multichannel equalizer would not have obvious degradation if the time delays of subchannels were chosen the same parameter which equals to the channel order. Furthermore, the complexity of the system structure is reduced greatly.