Iterative Spectrum Shaping With Opportunistic Multiuser Detection

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Executive Summary

This paper studies a new decentralized resource allocation strategy, named Iterative Spectrum Shaping (ISS), for the multi-carrier-based multiuser communication system, where two coexisting users independently and sequentially update transmit power allocations over parallel subcarriers to maximize their individual transmit rates. Unlike the conventional Iterative Water-Filling (IWF) algorithm that applies the Single-user Detection (SD) at each user's receiver by treating the interference from the other user as additional noise, the proposed ISS algorithm applies multiuser detection techniques to decode both the desired user's and interference user's messages if it is feasible, thus termed as Opportunistic Multiuser Detection (OMD).

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