Tap selection based MMSE equalization for high data rate UWB communication systems

The performance of a tap selection based minimum mean square error (MMSE) equalization technique for high data rate ultra wideband (UWB) systems is analyzed. This technique is shown to outperform significantly the conventional uniformly spaced equalizer with the same number of taps. In addition, the impact of channel estimation error on the performance of tap selection based decision feedback equalization (DFE) is analyzed. This channel estimation based DFE is shown to perform well with only a few training symbols. It can then be adapted effectively using a least mean squares (LMS) algorithm for improved performance. Numerical analysis and simulation results show that the tap selection based equalization technique is a promising approach for practical high performance UWB system implementation with reduced complexity.