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Optimal Energy Beamforming to Minimize Transmit Power in Multi Antennae Wireless Powered Communication Network

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Alternative Title
Optimal Energy Beamforming to Minimize Transmit Power in Multi Antennae Wireless Powered Communication Network
Abstract
In this paper, we study the transmit power minimization problem with optimal energy beamforming in a multi-antenna wireless powered communication network (WPCN). The considered network consists of one hybrid access point (H-AP) with multiple antennae and multiple users with a single antenna each. The H-AP broadcasts an energy signal on downlink, using energy beamforming to enhance the efficiency of the transmit energy. In this paper, we jointly optimize the downlink time allocation for wireless energy transfer (WET), the uplink time allocation for each user to send a wireless information signal to the H-AP, the power allocation to each user on uplink, and the downlink energy beamforming vectors while controlling the transmit power at the H-AP. It is challenging to solve this non-convex complex optimization problem, because it is numerically intractable and involves high computational complexity. We exploit a sequential parametric convex approximation (SPCA)-based iterative method, and we propose optimal and sub-optimal solutions for the transmit power minimization problem. All the proposed schemes are verified by numerical simulations. Through the simulation results, we present the performance of the proposed schemes based on the effect of the number of transmit antennae and the number of users in the proposed WPCN. Through the performance evaluation, we show that the SPCA-based joint optimization solution performance is superior to other solutions.
Author(s)
구인수카마나 아코스타 마리오 로드리하미드 하피자 이크라Pham-Viet Tuan
Issued Date
2021
Type
Article
Keyword
wireless energy transferwireless information transfertransmit power controlsequential parametric convex approximation
DOI
10.3390/electronics10040509
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9047
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_doaj_primary_oai_doaj_org_article_4b9b9a1b5f324f02890fa1feea1a07a2&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Optimal%20Energy%20Beamforming%20to%20Minimize%20Transmit%20Power%20in%20Multi%20Antennae%20Wireless%20Powered%20Communication%20Network&offset=0&pcAvailability=true
Publisher
ELECTRONICS
Location
스위스
Language
영어
ISSN
2079-9292
Citation Volume
10
Citation Number
4
Citation Start Page
1
Citation End Page
16
Appears in Collections:
Engineering > IT Convergence
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