Multiple ARQ processes for MIMO systems

Zheng, Haitao; Lozano Solsona, Angel; Haleem, Mohamed

doi:http://dx.doi.org/10.1155/S1110865704311042

Multiple ARQ processes for MIMO systems

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Citation

Zheng H, Lozano A, Haleem M. Multiple ARQ processes for MIMO systems. EURASIP J. Appl Signal Processing. 2004; 23(5):772-82. DOI: 10.1155/S1110865704311042

Abstract

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.