Interference Mitigation Via Joint Detection

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This paper addresses the design of optimal and near-optimal detectors in an interference channel with fading and with Additive White Gaussian Noise (AWGN), where the transmitters employ discrete modulation schemes as in practical communication scenarios. The conventional detectors typically either ignore the interference or successively detect and then cancel the interference, assuming that the desired signal and/or the interference are Gaussian. This paper quantifies the significant performance gain that can be obtained if the detectors explicitly take into account the modulation formats of the desired and the interference signals.