Performance of POR multiuser detection for UWB communications

A power of R (POR) technique has been proposed to blindly estimate multipath parameters of the desired user in a multiple access ultra wideband (UWB) system. In this paper, we first analyze the performance of the POR method in terms of both channel estimation mean-square-error (MSE) and receiver´s output signal to interference plus noise ratio (SINR) and bit error rate (BER). Then we compare this method with both subspace and maximum likelihood methods based on practical UWB channels. Simulation results verify our analysis. They also show that the proposed POR method outperforms the subspace method for heavily loaded systems, and is superior to the maximum likelihood approach in all examined examples.