Improvement of TiR-UWB Communication System Performance in Presence of Channel Estimation Error

In this paper, we improve the performance of the TiR-UWB communication systems with the non-ideal estimation of the channel. Time Reversal (TiR) technique is an effective and simple method for data transmission in extremely multipath indoor UWB channels that mitigates the complexity of receiver by its own time focusing feature. Although, TiR method has the suitable performance, but it is sensitive to the non-ideal channel estimation error. Most of the previous researches have assumed the ideal estimation of the channel for the performance study. In this letter, we have designed an improved TiR-based pre-filter by the estimation error covariance of the channel. Furthermore, it is indicated analytically that the designed pre-filter depends on the existent channel estimation error covariance. The improvement of performance of proposed method as well retaining time focusing of TiR technique is demonstrated by using of simulation.