Successive interference cancellation in multiuser relaying with fast frequency-hopping modulation

A novel iterative receiver is proposed for relay-aided multiuser communications in which multiple users transmit to a destination with the help of a relay and using fast frequency-hopping modulation. Each user employs a channel encoder to protect its information data and to help interference cancellation at the receiver. The received signal at the relay is partially decoded with a simple energy detector. At the destination, the iterative receiver exploits the soft outputs of the channel decoders to successively extract the maximum likelihood symbols of the users and perform interference cancellation. Under the same spectral efficiency, simulation results demonstrate the excellent performance of the proposed receiver when compared to the performance of decoding without interference cancellation as well as performance of the maximum likelihood multiuser detection previously developed for uncoded transmission.

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