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On Noisy ARQ in Block-Fading Channels

Behrooz Makki (Institutionen för signaler och system, Kommunikationssystem) ; Alexandre Graell i Amat (Institutionen för signaler och system, Kommunikationssystem) ; Thomas Eriksson (Institutionen för signaler och system, Kommunikationssystem ; Institutionen för signaler och system, Informationsteori)
IEEE Transactions on Vehicular Technology (0018-9545). Vol. 63 (2014), 2, p. 731-746.
[Artikel, refereegranskad vetenskaplig]

Assuming noisy feedback channels, this paper investigates the data transmission efficiency and robustness of different automatic repeat request (ARQ) schemes using adaptive power allocation. Considering different block-fading channel assumptions, the long-term throughput, the delay-limited throughput, the outage probability and the feedback load of different ARQ protocols are studied. A closed-form expression for the power-limited throughput optimization problem is obtained which is valid for different ARQ protocols and feedback channel conditions. Furthermore, the paper presents numerical investigations on the robustness of different ARQ protocols to feedback errors. It is shown that many analytical assertions about the ARQ protocols are valid both when the channel remains fixed during all retransmission rounds and when it changes in each round (in)dependently. As demonstrated, optimal power allocation is crucial for the performance of noisy ARQ schemes when the goal is to minimize the outage probability.

Nyckelord: Noisy feedback channel, ARQ, Automatic repeat request, block-fading channel, outage probability, power allocation, feedback load, throughput

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Denna post skapades 2013-07-22. Senast ändrad 2017-10-03.
CPL Pubid: 180231


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Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem (1900-2017)
Institutionen för signaler och system, Informationsteori (2005-2014)


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