Title :
Trellis-coded multiple-pulse-position modulation for wireless infrared communications
Author :
Park, Hyuncheol ; Barry, John R.
Author_Institution :
Sch. of Eng., Inf. & Commun. Univ., Taejon City, South Korea
fDate :
4/1/2004 12:00:00 AM
Abstract :
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 example, 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.
Keywords :
maximum likelihood detection; optical communication; optical modulation; pulse position modulation; trellis coded modulation; channel dispersion; lowpass filter; maximum likelihood sequence detection; multipath dispersion; multiple pulse position modulation; trellis code; wireless infrared communication; Bandwidth; Bit rate; Convolutional codes; Maximum likelihood detection; Modulation coding; Optical fiber communication; Optical filters; Optical receivers; Wireless communication; Wireless sensor networks;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2004.826382
