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Maximum-likelihood sequence estimation for coded modulation in the presence of co-channel interference and intersymbol interference

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2 Author(s)
Murata, H. ; Dept. of Electron. & Commun., Kyoto Univ., Japan ; Yoshida, S.

Co-channel interference is a major impairment in cellular radio systems. The article evaluates the performance of maximum-likelihood sequence estimation for coded modulation in the presence of co-channel interference and intersymbol interference. In this scheme, a maximum-likelihood sequence estimation implemented with the Viterbi algorithm is extended to estimate both the desired signal and co-channel interference, and combined with trellis-coded modulation to enhance the co-channel interference cancelling capability. The complexity of this scheme grows exponentially with the channel memory and the constraint length of the trellis encoder. Two reduced-state sequence estimation algorithms, namely, the T-algorithm and the M-algorithm, are compared through simulations and the former is found to yield better performance, especially over quasi-static channels

Published in:

Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th  (Volume:2 )

Date of Conference:

28 Apr-1 May 1996