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Generating Functional Analysis for Iterative CDMA Multiuser Detectors

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Executive Summary

The authors investigate the detection dynamics of a soft Parallel Interference Canceller (soft-PIC), which includes a hard-PIC as a special case, for CDMA multiuser detection, applied to a randomly spread, fully synchronous base-band uncoded CDMA channel model with Additive White Gaussian Noise (AWGN) under perfect power control in the large-system limit. They analyze the detection dynamics of some iterative detectors, namely soft-PIC, the Onsager-Reaction-Cancelling Parallel Interference Canceller (ORC-PIC) and the Belief-Propagation (BP)-based detector, by the Generating Functional Analysis (GFA).

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