Trellis-coded pulse-position modulation for indoor wireless infrared communications

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...

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Bibliographic Details
Main Authors: Lee, D.C.M., Kahn, J.M., Audeh, M.D.
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Intersymbol interference
Maximum likelihood detection
Optical fiber communication
Optical noise
Optical receivers
Optical transmitters
Pulse modulation
Signal to noise ratio
Wireless communication
Online Access:Request full text
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Summary: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 0.02 to 0.3. Finally, we present Monte Carlo simulation results to verify our analysis.
DOI:10.1109/PIMRC.1996.567414