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A dual mode multiuser detector is proposed. It dynamically switches its detection mode between matched filter and successive interference cancellation (SIC) detector, based on the channel characteristics. The main criterion of choosing the SIC detector is that it has minimum bit error rate (BER) among all nonlinear multiuser detectors. This detector reduces overall complexity while maintaining the same performance as the SIC detector. The switching mechanism is exploited by a performance-complexity tradeoff between the matched filter detector and SIC detector.
Date of Conference: 23-25 Jan. 2005