2016
DOI: 10.1109/twc.2015.2469289
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Optimizing the Code Rate of Energy-Constrained Wireless Communications With HARQ

Abstract: Retransmissions due to decoding errors have a big impact on the energy budget of low-power wireless communication devices, which can be reduced by using hybrid automatic repeat request (HARQ) techniques. Nevertheless, this reduction comes at the cost of extra energy consumption introduced by the added computational load. No complete analysis of the trade-off between retransmissions reduction and baseband consumption of low-power communications over fading channels has been reported so far.In this article, we s… Show more

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Cited by 31 publications
(29 citation statements)
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References 44 publications
(76 reference statements)
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“…The average number of transmission trials,τ , was calculated using the tools presented in [21]. Link margin 20 dB * source: [22], ‡ source: [23], § source: [24], † source: [25], * * source: [26] Our results confirm that the optimal transmission distance, d * tx , is independent of the total link distance, d tot (see Figure 2). In effect, if d * tx > d tot then mobility cannot provide any benefits in terms of energy efficiency, and hence it is optimal to have no displacement, i.e.…”
Section: Multihop Link With Mobilitysupporting
confidence: 66%
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“…The average number of transmission trials,τ , was calculated using the tools presented in [21]. Link margin 20 dB * source: [22], ‡ source: [23], § source: [24], † source: [25], * * source: [26] Our results confirm that the optimal transmission distance, d * tx , is independent of the total link distance, d tot (see Figure 2). In effect, if d * tx > d tot then mobility cannot provide any benefits in terms of energy efficiency, and hence it is optimal to have no displacement, i.e.…”
Section: Multihop Link With Mobilitysupporting
confidence: 66%
“…We assume that the multihop link is continuously fed by packages of Q bits and hence the relays are always working. Under these assumptions, and following the model introduced in [22], the energy consumption per goodbit for transmitting forward frames and receiving feedback frames can be calculated as…”
Section: A Components Of Energy Consumption At the Transmittermentioning
confidence: 99%
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“…However, a detailed model for the transmission energy is outside the scope of this paper. The interested reader can find more advanced methods in [30]. We will first discuss the case where quantization is performed in the time domain; that is, the bit depth assigned to the microphone signal is equal for every frequency.…”
Section: Analysis Of Energy Consumptionmentioning
confidence: 99%
“…However, the RF circuitry energy consumption and the baseband processing are not considered by these works. Furthermore, the energy efficiency of some different HARQ techniques are studied in [16] in the Nakagami-m channel, which shows that code rate optimization is critical to maximize the energy efficiency, while the use of HARQ substantially extends the communication range.…”
Section: Introductionmentioning
confidence: 99%