Computer Science – Information Theory
Scientific paper
2009-04-10
IEEE Transactions on Wireless Communications, vol. 9, no. 5, pp. 1686-1697, May 2010
Computer Science
Information Theory
12 pages, 7 figures, and 2 tables
Scientific paper
10.1109/TWC.2010.05.090441
In this paper, efficient turbo packet combining for single carrier (SC) broadband multiple-input--multiple-output (MIMO) hybrid--automatic repeat request (ARQ) transmission with unknown co-channel interference (CCI) is studied. We propose a new frequency domain soft minimum mean square error (MMSE)-based signal level combining technique where received signals and channel frequency responses (CFR)s corresponding to all retransmissions are used to decode the data packet. We provide a recursive implementation algorithm for the introduced scheme, and show that both its computational complexity and memory requirements are quite insensitive to the ARQ delay, i.e., maximum number of ARQ rounds. Furthermore, we analyze the asymptotic performance, and show that under a sum-rank condition on the CCI MIMO ARQ channel, the proposed packet combining scheme is not interference-limited. Simulation results are provided to demonstrate the gains offered by the proposed technique.
Ait-Idir Tarik
Chafnaji Houda
Saoudi Samir
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