Codeword design for ultra-wideband (UWB) precoding

Yu Hao Chang*, Shang-Ho Tsai, Xiaoli Yu, C. C.Jay Kuo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


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.

Original languageEnglish
Article number5374063
Pages (from-to)198-207
Number of pages10
JournalIEEE Transactions on Wireless Communications
Issue number1
StatePublished - 1 Jan 2010


  • CPP
  • Channel phase precoding
  • Pre-Rake
  • Precoding
  • TRP
  • Time-reversal prefilter
  • UWB
  • Ultra-wideband


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