Open Access

Multiple ARQ Processes for MIMO Systems

EURASIP Journal on Advances in Signal Processing20042004:479713

Received: 4 December 2002

Published: 23 May 2004


We propose a new automatic repeat request (ARQ) scheme for MIMO systems with multiple transmit and receive antennas. The substreams emitted from various transmit antennas encounter distinct propagation channels and thus have different error statistics. When per-antenna encoders are used, separating ARQ processes among the substreams results in a throughput improvement. Moreover, it facilitates the interference cancellation in certain MIMO techniques. Quantitative results from UMTS simulations demonstrate that the proposed multiple ARQ structure yields more than 30% gain in link throughput.

Keywords and phrases

MIMO systemsautomatic repeat requestthroughputwireless communicationUMTS

Authors’ Affiliations

Wireless Research Laboratory, Lucent Technologies


© Zheng et al. 2004