Title: Codeword Design for Ultra-Wideband (UWB) Precoding
Authors: Chang, Yu-Hao
Tsai, Shang-Ho
Yu, Xiaoli
Kuo, C. -C. Jay
Department of Electrical and Computer Engineering
Keywords: Ultra-wideband;UWB;precoding;time-reversal prefilter;TRP;pre-Rake;channel phase precoding;CPP
Issue Date: 1-Jan-2010
Abstract: A precoding technique applied to symbols transmitted in an ultra-wideband (UWB) system can concentrate the signal power at the receiver for a higher data detection rate. The codeword design problem for optimal UWB precoding is investigated in this work. After the problem formulation, we examine its solution in the full-rank and the reduced-rank subspaces to obtain different tradeoffs between the detection performance and the amount of feedback messages. Furthermore, we propose two subspace selection schemes, each of which corresponds to a code design method. The resultant optimal codewords improve the performance of previous work significantly at the expense of a slightly increased amount of feedback messages. Finally, the performance of a precoded UWB system with various codewords is compared via computer simulation.
URI: http://dx.doi.org/10.1109/TWC.2010.01.081397
ISSN: 1536-1276
DOI: 10.1109/TWC.2010.01.081397
Volume: 9
Issue: 1
Begin Page: 198
End Page: 207
Appears in Collections:Articles

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