Turbo packet combining for broadband space-time BICM hybrid-ARQ systems with co-channel interference

Tarik Ait Idir (1, 2, 3) , Houda Chafnaji (1, 2, 3) , Samir Saoudi (4, 1)

1 SC - Département Signal et Communications
2 INPT - Institut National des Postes et Télécommunications [Rabat]
3 Lab-STICC - Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (UMR 3192)
4 Lab-STICC_TB_CACS_COM

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.

Mots clés: Automatic repeat request; Mechanisms; Multiple-input–multiple-output; MIMO; Single carrier

Domaines: Traitement du signal et de l'image [eess.SP]

Tarik Ait Idir, Houda Chafnaji, Samir Saoudi. Turbo packet combining for broadband space-time BICM hybrid-ARQ systems with co-channel interference. IEEE Transactions on Wireless Communications, 2010, 9 (5), pp.1686 - 1697. ⟨10.1109/TWC.2010.05.090441⟩. ⟨hal-00490388⟩