Ergodic Rate Analysis for Full-Duplex and Half-Duplex Networks with Energy Harvesting

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

The authors have investigated the full-duplex (FD) and half-duplex (HD) communication modes by considering energy harvesting .

 

The current version of the manuscript should be improved .

·         The introduction must clearly improved with the original scientific contribution of the manuscript with respect to other approaches known in the literature regarding the energy harvesting system reporting the following citations:

Sciuto, G. L., Bijak, J., Kowalik, Z., Szczygieł, M., & Trawiński, T. (2024). Displacement and Magnetic Induction Measurements of Energy Harvester System Based on Magnetic Spring Integrated in the Electromagnetic Vibration Generator. Journal of Vibration Engineering & Technologies, 12(3), 3305-3320.

Bijak, J., Sciuto, G. L., Kowalik, Z., Lasek, P., Szczygieł, M., & Trawiński, T. (2023). Magnetic flux density analysis of magnetic spring in energy harvester by Hall-Effect sensors and 2D magnetostatic FE model. Journal of Magnetism and Magnetic Materials, 579, 170796.

So I can suggest to add a section of related work.

·         More details about SWIPT network needs to be added in the section 2

·         The experimental data of electric power are not presented and the model appears too much theoretical, please justify

 

·         In section 2 the energy harvesting is assumed as “perfect” . Please explain why it is considered “perfect” and some details of  equation (1).

 

·         Please carefully change the name of Numerical results in Simulation results!!!

Comments on the Quality of English Language

The english language needs to be revised

Author Response

RESPONSE TO REVIEWER 1

    We appreciate your valuable comments and suggestions that have been instrumental in enhancing our paper. The revisions have meticulously incorporated feedback from you and other reviewers. We trust that our updated version meets your expectations.

Review1:

• The authors have investigated the full-duplex (FD) and half-duplex (HD) communication modes by considering energy harvesting .The current version of the manuscript should be improved . The introduction must clearly improved with the original scientific contribution of the manuscript with respect to other approaches known in the literature regarding the energy harvesting system reporting the following citations:

Sciuto, G. L., Bijak, J., Kowalik, Z., Szczygieł, M., & Trawiński, T. (2024). Displacement and Magnetic Induction Measurements of Energy Harvester System Based on Magnetic Spring Integrated in the Electromagnetic Vibration Generator.Journal of Vibration Engineering & Technologies,12(3), 3305-3320.

Bijak, J., Sciuto, G. L., Kowalik, Z., Lasek, P., Szczygieł, M., & Trawiński, T. (2023). Magnetic flux density analysis of magnetic spring in energy harvester by Hall-Effect sensors and 2D magnetostatic FE model. Journal of Magnetism and Magnetic Materials, 579, 170796.

So I can suggest to add a section of related work.

More details about SWIPT network needs to be added in the section 2

Yes, following this suggestion, Section 2 has been included, and relevant references have been incorporated into the reference list for this revision.

• The experimental data of electric power are not presented and the model appears too much theoretical, please justify

Indeed, following this suggestion, the simulation has been included in Figures 4 and 7.

• In section 2 the energy harvesting is assumed as “perfect” . Please explain why it is considered “perfect” and some details of equation (1).

Thank you very much for your suggestion.  η represents the energy harvesting efficiency (when η=1, all the received power from the downlink is used for uplink transmission ).

 

• Please carefully change the name of Numerical results in Simulation results!!!

Indeed, the necessary modifications have been made in the revised version.

 

Reviewer 2 Report

Comments and Suggestions for Authors

In the paper, the authors computes the ergodic data rates for both full-duplex and half-duplex communication modes by considering energy harvesting. Simulations are given considering different values for some parameters as the distance from the source to the user, the power-split coefficient for transmit power or the residual self-interference coefficient.

My  main concern is if the contribution is sufficient to justify the publication in a journal indexed in well-known data bases. Being given the system model, the ergodic downlink and uplink data rates immediately result from the Shannon theory and with some known integrals.

A second concern is regarding the given simulations. The authors state that "the derived exact closed-form expressions are validated by using numerical evaluation via Monte Carlo simulation". However, none of the figures compares two curves for the same scenario: one resulted from the exact closed-form expression and the other resulted from Monte Carlo simulation.

Some other issues are:

- In Subsection 2.1, notation "CN(0,1)" should be explained.

- In eq. (1), the vertical bar after superscript 2 has to be removed.

- In eq. (2): instead of "$P^T$" --> "$P_U^T$".

- In Figs. 2-4 and 7, in the legend, instead of the coefficient $\alpha$, a comma is written. Also, instead of the decimal point, a colon mark is written.

- In Figs. 6 and 8, in the legend, instead of the coefficient $\lambda$, a comma is written.

Comments on the Quality of English Language

Some minor issues have to be corrected.

Author Response

 RESPONSE TO REVIEWER 2

    We appreciate your valuable comments and suggestions. The paper has been thoroughly revised, incorporating all feedback provided by you and the other reviewers. We trust that you will find our revisions satisfactory.

• A second concern is regarding the given simulations. The authors state that "the derived exact closed-form expressions are validated by using numerical evaluation via Monte Carlo simulation". However, none of the figures compares two curves for the same scenario: one resulted from the exact closed-form expression and the other resulted from Monte Carlo simulation.

Yes, following this suggestion, the simulation has been included in Figures 4 and 7.

• Some other issues are:

- In Subsection 2.1, notation "CN(0,1)" should be explained.

- In eq. (1), the vertical bar after superscript 2 has to be removed.

In eq. (2): instead of "$P^T$" --> "$P_U^T$".

- In Figs. 2-4 and 7, in the legend, instead of the coefficient $\alpha$, a comma is written. Also, instead of the decimal point, a colon mark is written.

- In Figs. 6 and 8, in the legend, instead of the coefficient $\lambda$, a comma is written.

Yes, we have made the necessary corrections in the revised edition. Here, CN(0,1) represents a circularly symmetric complex Gaussian variable with a mean of 0 and a variance of 1.

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The article is improved so it can be accepted for publication

Author Response

RESPONSE TO REVIEWER 1

   We thank you for your constructive comments and suggestions. We have revised our paper taking into account all of your and other reviewers’ comments/suggestions. We hope you will be satisfied with our revision.

• Q1: The reviewer has no further comment.

A1: Thanks.

Reviewer 2 Report

Comments and Suggestions for Authors

The authors have addressed my comments in the first review round except the most important regarding the contribution. No answer is given for the comment "My  main concern is if the contribution is sufficient to justify the publication in a journal indexed in well-known data bases. Being given the system model, the ergodic downlink and uplink data rates immediately result from the Shannon theory and with some known integrals.". In my opinion the contribution is too low to justify the publication in a SCIE indexed journal.

Author Response

RESPONSE TO REVIEWER 2

    We thank you for your constructive comments and suggestions. We have revised our paper taking into account all of your and other reviewers’ comments/suggestions. We hope you will be satisfied with our revision.

• Q1: My main concern is if the contribution is sufficient to justify the publication in a journal indexed in well-known data bases. Being given the system model, the ergodic downlink and uplink data rates immediately result from the Shannon theory and with some known integrals.

A1: Thanks. In this paper, we assume that the mobile devices could charge their power by exploiting the dissipated power of the BS, and FD technique with energy harvesting capability is investigated. The ergodic data rate is shown to be substantially improved by employing in band FD mode due to its inherent bidirectional communication by using only one frequency band. It is shown that in the signal-to-noise ratio (SNR) range of [0, 24] dB, the FD mode always outperforms the HD mode in terms of ergodic data rate. The main contributions of this paper include:1) The analytic expressions of downlink/uplink ergodic data rates for FD/HD node with SWIPT are derived; 2) the impact of power split parameter on energy harvesting is analyzed; 3) the impact of self-interference cancellation capability with residual self-interference (RSI) coefficient λ on the FD node is studied.

 

Round 3

Reviewer 2 Report

Comments and Suggestions for Authors

I have no more comments.