Novel Adaptive Receivers with Low Complexity for Multi-User UWB

New low-complexity adaptive receivers are proposed for time-hopping binary phase shift keying ultra-wide bandwidth systems with multiple users. Both additive white Gaussian noise and multipath fading channels are considered. Numerical results show that the new adaptive receivers outperform the conventional matched-filter receivers in both additive white Gaussian noise and multipath fading channels, when the multiple-access interference is present. Moreover, the performance gain increases when the number of users decreases or the signal-to-noise ratio increases.