2010/12/21 by Chunhua Geng, Yukui Pei, Geng, Chunhua +5
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Antenna Design and Analysis #FOS: Computer and information sciences #Gyrotron and Vacuum Electronics Research #Information Theory (cs.IT) #Ultra-Wideband Communications Technology #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1012.4542
5 pages, 7 figures, submitted to IEEE VTC 2011 spring in Sept.2010
arxiv created 2010/12/21 · openalex publication_date 2010/12/21 · arxiv updated 2010/12/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, we investigate the impact of mistiming on the performance of Rake receivers in direct-sequence ultra-wideband (DS-UWB) systems from the perspective of the achievable information rate. A generalized expression for the performance degradation due to mistiming is derived. Monte Carlo simulations based on this expression are then conducted, which demonstrate that the performance loss has little relationship with the target achievable information rate, but varies significantly with the system bandwidth and the multipath diversity order, which reflects design trade-offs among the system timing requirement, the bandwidth and the implementation complexity. In addition, the performance degradations of Rake receivers with different multipath component selection schemes and combining techniques are compared. Among these receivers, the widely used maximal ratio combining (MRC) selective-Rake (S-Rake) suffers the largest performance loss in the presence of mistiming.