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Power Allocation for Goodput Optimization in BICM-OFDM Systems

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Executive Summary

This paper deals with the power allocation problem for coded multicarrier transmission. Specifically, the authors focus on a Bit Interleaved Coded Modulation (BICM) packet transmission implemented with Orthogonal Frequency Division Multiplexing (OFDM) and in the presence of Automatic Repeat reQuest (ARQ) protocol. Capitalizing on the Binary-Input Output-Symmetric (BIOS) nature of the BICM channel it is provided a simple upper-bound of the rate of information bits received without any error, the so called goodput. Based on this theoretical characterization, they develop a power allocation strategy among the different subcarriers so that the system goodput performance metric is maximized. The effectiveness of the proposed method is numerically testified for BICM-OFDM transmission in the context of the typical WLAN scenario.

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