Performance evaluation of an adaptive GSM receiver with frequency-selective fading and adjacent- and co-channel interference
This study represents the sequel and conclusion of a previous article published in a previous issue of this journal. In that article, the problem of theoretically evaluating the performance of an adaptive MLSE receiver for MSK signals on a frequency-selective stationary radio propagation channel was analyzed. The theoretical findings, in the form of upper and lower bounds to the BER of the receiver, were validated by means of computer simulations. In this paper, the performance of the same scheme of channel-estimator-plus-Viterbi-equalizer receiver for mobile communications in a more realistic operating environment is analyzed. In particular, the groupe special mobile (GSM) transmission format is completely encompassed based on the Gaussian minimum shift keying (GMSK) modulation scheme and on narrowband time-division multiple access (TDMA) transmission. Also, the assumption of a time-invariant propagation channel is removed, assuming the recommended standard GSM channels as benchmark transmission conditions. Finally, with the aid of extensive computer simulations, the sensitivity of the MLSE receiver to unwanted co-channel and adjacent-channel interference coming from other users of the mobile cellular GSM system is analyzed.(Author abstract)
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