Trellis-Coded Multiple-Pulse-Position Modulation for Wireless Infrared Communications

H. Park, J.R. Barry
2004 IEEE Transactions on Communications  
We present new trellis codes based on multiple-pulse-position modulation (MPPM) for wireless infrared communication. We assume that the receiver uses maximum-likelihood sequence detection to mitigate the effects of channel dispersion, which we model using a first-order lowpass filter. Compared to trellis codes based on PPM, the new codes are less sensitive to multipath dispersion and offer better power efficiency when the desired bit rate is large, compared with the channel bandwidth. For
more » ... e, when the bit rate equals the bandwidth, trellis-coded 17 2 -MPPM requires 1.4 dB less optical power than trellis-coded 16-PPM having the same constraint length. Index Terms-Maximum-likelihood sequence detector (MLSD), minimum distance, symmetry, trellis-coded multiple-pulse-position modulation (TC-MPPM). Hyuncheol Park (M'92) received the B.S. and M.S. degrees in electronics engineering from Yonsei University, Seoul, Korea, in 1983 and 1985 , respectively, and the Ph.D. degree in electrical engineering from
doi:10.1109/tcomm.2004.826382 fatcat:jvhfxzy7tvb3zm5rfoa3dqqdim