@inproceedings{049ed1ec0e334c54814ebdd79e9aceb6,
title = "The optimal transmission power per round for hybrid-ARQ Rayleigh fading links",
abstract = "We address the fundamental problem of identifying the optimal power allocation sequence for hybrid automatic-repeat-request (H-ARQ) communications over quasistatic Rayleigh fading channels. For any targeted H-ARQ link outage probability, we find the sequence of power values that minimizes the average total expended transmission power. The newly founded power allocation solution reveals that conventional equal-power H-ARQ assignment is far from optimal. For example, for targeted outage probability of 10-3 with a maximum of two transmissions, the average total transmission power with optimal assignment is 9dB lower than the equal-power protocol. The difference in average total power cost grows further when the number of allowable retransmissions increases (for example, 11dB gain with a cap of 5 transmissions) or the targeted outage probability decreases (27dB gain with outage probability 10-5 and transmissions capped at 5).",
keywords = "Hybrid automatic-repeat-request protocol, Optimum power allocation, Outage probability, Rayleigh fading",
author = "Weifeng Su and Sangkook Lee and Pados, \{Dimitris A.\} and Matyjas, \{John D.\}",
year = "2010",
doi = "10.1109/ICC.2010.5502465",
language = "English",
isbn = "9781424464043",
series = "IEEE International Conference on Communications",
booktitle = "2010 IEEE International Conference on Communications, ICC 2010",
note = "2010 IEEE International Conference on Communications, ICC 2010 ; Conference date: 23-05-2010 Through 27-05-2010",
}