Complexity Reduction by Combining Time Reversal and IR-UWB

In this paper, the authors deal with the problem of minimizing the complexity of an IR-UWB system by the introduction of Time-Reversal, under a power constraint and fixing a reachable performance in terms of BER. An approximate trade-off in the choice of the number of taps at the transmitter and the number of fingers at the receiver is proposed. In a classical communication chain, the reception of a signal facing multipath with a bank of Single User Matched Filters (SUMF) is accomplished by the RAKE receiver, whose number of fingers increases with the number of paths of the multipath channel.