標題: UWB communications with under-sampled receivers
作者: Wu, Wei-De
Wang, Chung-Hsuan
Chiu, Mao-Ching
Chao, Chi-Chao
電子工程學系及電子研究所
電信工程研究所
Department of Electronics Engineering and Institute of Electronics
Institute of Communications Engineering
公開日期: 2006
摘要: In this paper, we investigate a novel coding idea proposed previously to enable under-sampled receivers. An under-sampled receiver can sample the received baseband signals at only a fraction of the Nyquist rate and turns out to be an effective solution to the bottleneck of high-rate sampling and processing in ultra-wideband (UWB) communications. The spectrum aliasing problem can be solved by an analogy between an under-sampled system and a multiple-antenna one. However, underlying differences between the two systems exist and motivate the study of the fundamental limits of a coded under-sampled system. The study is carried out by characterizing the optimal coding structures with and without channel state information at transmitter (CSIT). A practical selective coding structure is also developed to provide satisfactory performance with reduced CSIT requirement. Finally, simulations are conducted to verify the theoretical characterization. Our results indicate that an under-sampled UWB system can benefit from power-saving, cost reduction, and full multipath diversity at the expanse of little or confined performance degradation.
URI: http://dx.doi.org/10.1109/ISIT.2006.262100
http://hdl.handle.net/11536/134477
ISBN: 978-1-4244-0505-3
DOI: 10.1109/ISIT.2006.262100
期刊: 2006 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY, VOLS 1-6, PROCEEDINGS
起始頁: 2588
結束頁: +
顯示於類別:會議論文