Title :
Trellis-coded multiple-pulse position modulation for wireless infrared communications
Author :
Park, Hyuncheol ; Barry, John R.
Author_Institution :
Telecommun. Lab., Samsung Electron. Co. Ltd., Suwon, South Korea
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 low-pass 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 to the channel bandwidth. For example, when the bit rate equals the bandwidth, trellis-coded (217)-MPPM requires 1.4 dB less optical power than trellis-coded 16-PPM having the same constraint length
Keywords :
dispersive channels; filtering theory; low-pass filters; maximum likelihood detection; multipath channels; optical communication; optical modulation; pulse position modulation; trellis codes; bit rate; channel bandwidth; channel dispersion; coding gain; constraint length; first-order low-pass filter; maximum-likelihood sequence detection; multipath dispersion; multiple-pulse position modulation; optical power; power efficiency; receiver; trellis codes; trellis-coded 16-PPM; trellis-coded multiple-pulse position modulation; wireless infrared communications; Bandwidth; Bit rate; Convolutional codes; Dispersion; Maximum likelihood detection; Modulation coding; Optical fiber communication; Optical receivers; Wireless communication; Wireless sensor networks;
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
DOI :
10.1109/GLOCOM.1998.775728
