On the Throughput of Interference-Based Wireless Powered Communications with Receive Antenna Selection

Yazan H. Al-Badarneh, Costas Georghiades, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

Abstract

We propose an interference-based wireless powered communication system in which an energy constrained source harvests energy from a single dominant co-channel interferer and then transmits information to a destination equipped with $N$ receive antennas. Assuming interference dominates noise power at the destination and the receive antenna that maximizes the signal-to-interference ratio is selected, we investigate the average throughput for the delay-limited and delay-tolerant transmission modes. In particular, we derive an analytical expression of the average throughput for the delay-limited transmission mode, and a precise lower bound on the average throughput for the delay-tolerant transmission mode. Furthermore, we derive simplified asymptotic expressions of the average throughput for both transmission modes assuming asymptotically large number of receive antennas (i.e., $N \to \infty$). We use the obtained asymptotic expressions to derive insightful closed-form expressions for the optimal energy harvesting time, which maximizes the average throughput, for both transmission modes. We show that the throughput-optimal energy harvesting time for the delay-limited and the delay-tolerant transmission scale like $O \left(\frac{1} {\sqrt{N}}\right)$ and $O \left(\frac{1}{ \log(N)} \right)$, respectively, for asymptotically large $N$.
Original languageEnglish (US)
Pages (from-to)1-1
Number of pages1
JournalIEEE Transactions on Vehicular Technology
Volume69
Issue number3
DOIs
StatePublished - 2020

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