We devise the optimal detection scheme in multiuser multicarrier based systems. We focus on the critical uplink scenario where several multicarrier signals belonging to distinct users propagate through independent time-variant frequency selective fading channels, and experience independent time offsets and carrier frequency offsets. We consider an efficient discrete-time system implementation a...

In this paper, we develop an iterative multiuser receiver for decoding Turbo coded synchronous CDMA signals in both Gaussian and non-Gaussian noise. A soft-input soft-output non-linear multiuser detector is combined with a set of single user channel decoders in an iterative detection/decoding structure. The non-linear multiuser detector utilizes the prior probabilities of each user's bits to fo...

This paper presents efficient algorithms and architecture designs that can meet real-time requirements of multiuser channel estimation and detection in future wireless base-station receivers. Sophisticated algorithms proposed to implement multiuser channel estimation and detection make their real-time implementation difficult on current Digital Signal Processor (DSP)-based receivers. A maximum-...

| Multiple access interference (MAI) is a signi cant limiting factor in the performance of direct sequence code division multiple access (DS-CDMA) systems. Various multiuser detection techniques have been developed to combat the e ects of MAI. These detection techniques either assume the knowledge of all the users in the system (conventional) or assume the knowledge of the user of interest only...

Interference cancellation with an array processing MLSE receiver, " IEEE Trans.

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The decorrelating detector and the linear minimum mean-square error (MMSE) detector are known to be effective strategies to counter the presence of multiuser interference in code-division multiple-access channels; in particular, those multiuser detectors provide optimum near-far resistance. When training data sequences are available, the MMSE multiuser detector can be implemented adaptively wit...