Title :
Trellis-coded pulse-position modulation for indoor wireless infrared communications
Author :
Lee, David C M ; Kahn, Joseph M. ; Audeh, Malik D.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
We analyze the performance of trellis-coded pulse-position modulation (PPM) on indoor, wireless infrared channels. We show that maximum-likelihood sequence detection (MLSD) of trellis-coded PPM is very effective in mitigating the multipath dispersion on such channels. We present code search results for high constraint-length, rate-2/3, 8-PPM and rate-3/4, 16-PPM codes. We provide bit-error rate curves and intersymbol interference power-penalties for MLSD of PPM with these codes, evaluated on ceiling-bounce channel models with delay spread per bit duration ratios of 0.01-0.3. Finally, we present Monte Carlo simulation results to verify our analysis
Keywords :
coding errors; error statistics; intersymbol interference; light interference; maximum likelihood detection; modulation coding; multipath channels; optical communication; optical modulation; optical signal detection; pulse position modulation; trellis codes; 16-PPM; 8-PPM; MLSD; Monte Carlo simulation results; bit error rate curves; ceiling bounce channel models; code rate; code search results; delay spread per bit duration ratios; high constraint-length codes; indoor wireless infrared communications; intersymbol interference power penalties; maximum likelihood sequence detection; multipath dispersion; performance evaluation; trellis coded pulse position modulation; trellis-coded PPM; wireless infrared channels; Acoustical engineering; Bandwidth; Fluorescent lamps; Intersymbol interference; Maximum likelihood detection; Optical fiber communication; Optical receivers; Optical transmitters; Pulse modulation; Wireless communication;
Journal_Title :
Communications, IEEE Transactions on
