In high rate DS-UWB systems with low spreading factor, the selective multipath interference canceller with linear equalization (SMPIC-LE) is developed to alleviate severe multipath interferences induced by the poor orthogonality of spreading codes. The SMPIC iteratively mitigates the strongest inter-path interference, inter-chip interference and inter-symbol interference, while the former two are unresolvable in conventional RAKE-decision feedback equalizer (DFE) receivers. The numerical results and complexity analysis demonstrate that SMPIC-LE with proper parameters provides an attractive overall advantage in performance and computational complexity compared with RAKE-DFE. In addition, it approaches the matched filter bound well as the RAKE finger in SMPIC increases.
@article{arxiv.1012.4556,
title = {Selective Multipath Interference Canceller with Linear Equalization for DS-UWB Systems with Low Spreading Factor},
author = {Chunhua Geng and Yukui Pei and Ning Ge},
journal= {arXiv preprint arXiv:1012.4556},
year = {2010}
}