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http://dx.doi.org/10.5762/KAIS.2013.14.10.5162

Decoding Method of Repetition Pulses Using Time-Hopping Sequence for UWB-IR in Multi User Environments  

Min, Seungwook (Department of Computer Science, Sangmyung University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.10, 2013 , pp. 5162-5168 More about this Journal
Abstract
Hopping sequences of Time Hopped Ultra Wideband Impulse Radio (TH-UWB-IR) system are to mitigate multipath fading and to provide the multiple access chances for multi users. For the reliable communications, the same pulses are repeatedly transmitted for a bit duration based on hopping sequences. The proposed decoding scheme utilizes the intervals of inter-codes in a frame where the short interval between two pulses leads to the large interference by the multipath fading. For a single user case, the proposed method obtains 0.5dB gain over the conventional method at BER=$10^{-3}$. Decoding performance of repeated pulses can be increased using the property of the hopping sequences of multi users.
Keywords
interframe interference (IFI); inter-symbol interference (ISI); multi-user; time-hopping; UWB (ultrawide band);
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