Abstract
The effects of multipath propagation lead to a significant decrease in system performance in most of the proposed ultra-wideband communication systems. A time-reversed system utilises the multipath channel impulse response to decrease receiver complexity, through a prefiltering at the transmitter. This paper discusses the modelling and comparative performance of a UWB system utilising time-reversed communications. System equations are presented, together with a semianalytical formulation on the level of intersymbol interference and multiuser interference. The standardised IEEE 802.15.3a channel model is applied, and the estimated error performance is compared through simulation with the performance of both time-hopped time-reversed and RAKE-based UWB systems.
Highlights
Following the release for commercial applications in early 2002 [1], ultra-wideband (UWB) communications, or impulse radio, has seen significant attention
A RAKE structure is common in UWB communications in order to offset channel effects, with a branch dedicated to each arriving path encompassed in the decision process [17]
This paper focuses on the performance of an All-RAKE
Summary
Following the release for commercial applications in early 2002 [1], ultra-wideband (UWB) communications, or impulse radio, has seen significant attention. The transmitted time-reversed signal retraces its path through the channel, resulting in an autocorrelation of the response being received [7,8,9]. This extends from work in underwater experimentation with soundwaves, as in [10]. There are fundamental drawbacks of a timereversed system These include (i) determining the channel impulse response from the transmitter to the receiver for use in the former;.
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