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Title: TCM coding of PPM based modulations for Infrared WLAN's impaired by ISI
Author: Alves, R.
Gameiro, A.
Keywords: Infrared wireless communications
Pulse Position Modulation
Trellis-Coded Modulation
InterSymbol Interference
Issue Date: 2006
Publisher: IEEE
Abstract: In this communication we consider the use of PPM based modulation methods, such as the hybrid modulation method called Amplitude and Pulse-Position Modulation (APPM) and Overlapping Pulse-Position Modulation (OPPM) to improve the performance of infrared WLAN’s, by the use of Trellis-Coded Modulation (TCM) codes. We describe the best code search and results, which demonstrate that, even with trellis codes of moderate complexity, non-negligible coding gains can be obtained without bandwidth expansion. Monte Carlo simulations have been done to compare uncoded PPM against APPM and OPPM TCM coded systems performances, on ceiling-bounce channel models for various values of delay spread. Although our codes were derived for the AWGN channel without Inter-Symbol Interference (ISI) awareness, their behavior in multipath dispersion channels is quite effective.
Peer review: yes
DOI: 10.1109/ISWPC.2006.1613647
ISBN: 0-7803-9410-0
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