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Joint Spectral Efficiency Optimization of Uplink and Downlink for Massive MIMO Enabled Wireless Energy Harvesting Systems
Chen Liu
Nanjing University of Posts and Telecommunications
Corresponding Author
ORCiD: https://orcid.org/0000-0002-9532-7721
License:
This work is licensed under a CC BY 4.0 License. Read Full License
This paper proposes a unified system model and uses a general wireless energy harvesting (EH) protocol in massive multiple-input multiple-output (MIMO) systems, in which the terminals have no fixed power supply and thus need to replenish energy via the received signals from the base station (BS). On the downlink, the BS delivers radio frequency (RF) signals to all terminals and each terminal coordinates the processes of EH and information decoding (ID) with wireless EH protocol. On the uplink, a fraction of the harvested energy is used for uplink pilot transmission and the remaining fraction is used for uplink data transmission. Closed-form lower bound expressions for each terminal are first obtained on the uplink and downlink, respectively. Based on these expressions, we then formulate the joint spectral efficiency (SE) of uplink and downlink maximization problem with some practical constraints. As the formulated optimization problem is non-linear and non-convex, it is hard to solve directly. To provide a solution, an iteration algorithm is proposed by utilizing one-dimensional search technique and successive approximation method based on geometric program (GP). Additionally, the convergence and complexity of the proposed algorithm are discussed as well. Finally, the feasibility of the proposed algorithm and analytical results are demonstrated by extensive computer simulations.
Keywords
Wireless energy harvesting, Massive MIMO, Time-switching protocol, Power-splitting protocol, Spectral efficiency
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CURRENT STATUS: Under Review
Version 1
Posted 24 Sep, 2020
No community comments so far
Review #3 received
Received 03 Jan, 2021
Reviewer #3 agreed
On 02 Jan, 2021
Reviewer #2 agreed
On 31 Dec, 2020
Reviewers invited
Invitations sent on 23 Dec, 2020
Reviewer #1 agreed
On 23 Dec, 2020
Editor assigned
On 23 Sep, 2020
Editor invited
On 22 Sep, 2020
Submission checks complete
On 22 Sep, 2020
First submitted
On 18 Sep, 2020
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This preprint is under consideration at EURASIP Journal on Wireless Communications and Networking. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research
Joint Spectral Efficiency Optimization of Uplink and Downlink for Massive MIMO Enabled Wireless Energy Harvesting Systems
Chen Liu
Nanjing University of Posts and Telecommunications
Corresponding Author
ORCiD: https://orcid.org/0000-0002-9532-7721
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 24 Sep, 2020
No community comments so far
Review #3 received
Received 03 Jan, 2021
Reviewer #3 agreed
On 02 Jan, 2021
Reviewer #2 agreed
On 31 Dec, 2020
Reviewers invited
Invitations sent on 23 Dec, 2020
Reviewer #1 agreed
On 23 Dec, 2020
Editor assigned
On 23 Sep, 2020
Editor invited
On 22 Sep, 2020
Submission checks complete
On 22 Sep, 2020
First submitted
On 18 Sep, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
This paper proposes a unified system model and uses a general wireless energy harvesting (EH) protocol in massive multiple-input multiple-output (MIMO) systems, in which the terminals have no fixed power supply and thus need to replenish energy via the received signals from the base station (BS). On the downlink, the BS delivers radio frequency (RF) signals to all terminals and each terminal coordinates the processes of EH and information decoding (ID) with wireless EH protocol. On the uplink, a fraction of the harvested energy is used for uplink pilot transmission and the remaining fraction is used for uplink data transmission. Closed-form lower bound expressions for each terminal are first obtained on the uplink and downlink, respectively. Based on these expressions, we then formulate the joint spectral efficiency (SE) of uplink and downlink maximization problem with some practical constraints. As the formulated optimization problem is non-linear and non-convex, it is hard to solve directly. To provide a solution, an iteration algorithm is proposed by utilizing one-dimensional search technique and successive approximation method based on geometric program (GP). Additionally, the convergence and complexity of the proposed algorithm are discussed as well. Finally, the feasibility of the proposed algorithm and analytical results are demonstrated by extensive computer simulations.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Due to technical limitations, full-text HTML conversion of this manuscript could not be completed. However, the manuscript can be downloaded and accessed as a PDF.