MIMO ARQ with Multibit Feedback: Outage Analysis

This paper studies the asymptotic outage performance of Incremental Redundancy Automatic-Repeat-reQuest (INR-ARQ) transmission over Multiple-Input Multiple-Output (MIMO) block-fading channels with discrete input constellations. The authors first show that transmission with random codes using a discrete signal constellation across all transmit antennas achieves the optimal outage diversity given by the Singleton bound. The optimal SNR-exponent and outage diversity of INR-ARQ transmission over the MIMO block-fading channel are then analyzed. They show that a significant gain in outage diversity is obtained by providing more than one bit feedback at each ARQ round.

Provided by: Institute of Electrical & Electronic Engineers Topic: Networking Date Added: Feb 2012 Format: PDF

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