Mobility

Performance Evaluation of Fast Link Adaptation Algorithm for OFDM Systems

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Executive Summary

This paper investigate Link Quality Metrics (LQMs) based on effective signal-to-interference-and-noise ratio, and Mutual-Information (MI) for the purpose of fast link adaptation in communication systems employing orthogonal frequency division multiplexing and Multiple-Input Multiple-Output (MIMO) antenna technology. From these LQMs the Packet-Error-Rate (PER) can be estimated and exploited to select the Modulation and Coding Scheme (MCS) among various MCSs that achieves the maximum throughput for the current channel state under a specified target PER objective. The authors propose a novel MI-based LQM and compare the PER estimation accuracy obtained with this LQM with that resulting from using other LQMs by means of system level simulations.

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