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Power allocation in repetition time diversity hybrid automatic repeat request feedback

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)
IEEE Wireless Communications and Networking Conference, WCNC 2012, Paris, 1-4 April 2012 (1525-3511). p. 2329-2334. (2012)
[Konferensbidrag, refereegranskat]

This paper addresses the problem of optimal power allocation for hybrid automatic repeat request (HARQ) feedback over slowly-fading channels. We mainly focus on the repetition time diversity HARQ scheme where the results are obtained for both continuous and bursting communication models. Moreover, the effect of an outage probability constraint on the system data transmission efficiency is studied under different transmission power constraints. Simulation results show that 1) for Nakagami fading channels, the optimal HARQ-based (re)transmission powers maximizing the system throughput should be decreasing in every (re)transmission round, 2) higher rates are achieved in the continuous communication, when compared with the bursting model, and 3) HARQ feedback leads to considerable performance improvement even in outage-limited conditions.

Nyckelord: Communication models, Data transmission efficiency, Hybrid automatic repeat request, Nakagami fading channel, Optimal power allocation, Outage probability, Performance improvements, Power allocations, Repetition time, System throughput, Transmission power constraints, Communication, Data communication systems, Error correction, Fading channels, Information theory, Optimization, Wireless telecommunication systems, Outages



Denna post skapades 2012-09-11. Senast ändrad 2016-02-01.
CPL Pubid: 163181

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Kommunikationssystem

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur