Finite Blocklength Achievable Rates for Energy Harvesting AWGN Channels with Infinite Buffer

Shenoy, K Gautam; Sharma, Vinod

doi:10.48550/arxiv.1601.06410

Cited by 1 publication

(4 citation statements)

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“…For an energy harvesting transmitter operating under a save-then-transmit protocol (first proposed in [16]), a lower bound on the achievable rate at the receiver was derived in the finite blocklength regime [10]. For the setup considered in [10], the work in [12] provided tighter bounds on the non-asymptotic achievable rate for an AWGN energy harvesting channel. The authors in [13] 3 investigated the mean delay of an energy harvesting channel in the finite blocklength regime.…”

Section: Introductionmentioning

confidence: 99%

“…Unlike the work in [9], [10], [12], [13] which assume an infinite battery at the energy harvester, [14] conducted a finite-blocklength analysis for a battery-less energy harvesting channel.…”

Section: Introductionmentioning

confidence: 99%

“…Our work differs from the existing literature on several accounts. First, the prior work [9], [10], [12]- [14] on energy harvesting systems in the finite blocklength regime falls short of characterizing the performance for the case of wireless energy harvesting. Second, most prior 4 work [9], [10], [12]- [14], [16] implicitly assumes concurrent harvest and transmit operation, which may be infeasible in practice.…”

Section: Introductionmentioning

confidence: 99%

“…First, the prior work [9], [10], [12]- [14] on energy harvesting systems in the finite blocklength regime falls short of characterizing the performance for the case of wireless energy harvesting. Second, most prior 4 work [9], [10], [12]- [14], [16] implicitly assumes concurrent harvest and transmit operation, which may be infeasible in practice. For example, a power beacon may remain silent during the communication phase to avoid interfering with the communication link [7].…”

Section: Introductionmentioning

confidence: 99%

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Wirelessly Powered Communication Networks With Short Packets

Khan

Heath

Popovski

2017

IEEE Trans. Commun.

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Wirelessly powered communications will entail short packets due to naturally small payloads, lowlatency requirements and/or insufficient energy resources to support longer transmissions. In this paper, a wirelessly powered communication system is investigated where an energy harvesting transmitter, charged by one or more power beacons via wireless energy transfer, attempts to communicate with a receiver over a noisy channel. Under a save-then-transmit protocol, the system performance is characterized using metrics such as the energy supply probability at the transmitter, and the achievable rate at the receiver for the case of short packets. Leveraging the framework of finite-length information theory, tractable analytical expressions are derived for the considered metrics in terms of system parameters such as the harvest blocklength, the transmit blocklength, the harvested power and the transmit power.The analysis provides several useful design guidelines. Though using a small transmit power or a small transmit blocklength helps avoid energy outages, the consequently smaller signal-to-noise ratio or the fewer coding opportunities may cause an information outage. Scaling laws are derived to capture this inherent trade-off between the harvest and transmit blocklengths. Moreover, the asymptotically optimal transmit power is derived in closed-form. Numerical results reveal that power control is essential for improving the achievable rate of the system in the finite blocklength regime. The asymptotically optimal transmit power yields nearly optimal performance in the finite blocklength regime. Index TermsEnergy harvesting, wireless information and power transfer, energy supply probability, wireless power transfer, power control, finite-length information theory, non-asymptotic achievable rate.

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