UWB selective rake receiver using multiple comparators

Abstract

Recently, many literatures were presented to mitigate the noises or to suppress inter-symbol interference (ISI) and inter-frame interference (IFI) with systems operate in time hopping spread spectrum. The structure of the conventional rake-receiver is more complex that based on large number of multiple paths in wireless ultra wideband (UWB) communication systems. In this paper we proposed low complexity of rake-receiver that includes four fingers with additional finger used to support the outputs of other fingers by comparison process. This design is called multiple comparators rake-receiver. Low complexity receiver of maximum ratio combining (MRC) technique was simulated with perfect channel estimation. From simulation results, the optimized performance of the proposed scheme is presented by reducing the bit error rate (BER) with respect to conventional rake-receiver.