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

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3 Author(s)
Lee, D.C.M. ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; Kahn, J.M. ; Audeh, M.D.

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

Published in:

Communications, IEEE Transactions on  (Volume:45 ,  Issue: 9 )

Date of Publication:

Sep 1997

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