Review Reports

Round 1

Reviewer 1 Report

The paper proposed two coded cooperative schemes and relay selection. It also applies fuzzy logic to divide harvested power. Here are the comments from the reviewer:

 

1) why the authors propose a relaying method, HIR (given some SIR have been studied)? Compared to SIR, What're their respective pros and cons?  Discussions are needed the first section. 

 

2) What is the main difference between the SIR proposed in this paper and SIR in [7] [8] [9]? Discussions are needed the first section. 

 

3) In CC-SIR-RS, how to do power splitting?

 

4) Among all n_R relays, do the authors assume all of them can receive data from the source S, or some of the relays can receive data? 

 

5) A paradox happens: If there exists a direct link between the source and and the destination, why we need a relay? If no such link, why the authors assume P_SD is the received power at the destination node of the direct link (P_SD may be very small or even approcimately zero in such case). 

 

6) In equation (6), I cannot find C_TxRx, as indicated in (7). In addition, what does TxRx mean in TxRx=SR_r,R_rD(7)?

 

7) In Table 1 for fuzzy rules, why the output  fuzzy set do not contain rho(1) to rho(3)?

 

8) The authors adopt BPSK in simulations to show the superority of the proposed scheme. The reviewer is wondering if the schemes (CC-SIR and CC-HIR) still have the advantage in other high-order modulations, such as QPSK and 64QAM? 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 2 Report

The present manuscript deals with the simulations on the power conditioning of energy harvesting systems. Manuscript is interesting and can be accepted after suitably considering the comments below. 

(1) Abstract is too long. Main motivation and relevance of the present work must be briefly highlighted in this section.

(2) Does the performance of the model depends on the nature of energy harvester? 

(3) Various energy harvesters have different internal impedances. How does present model consider this issue? Does the scheme at all depends on the  impedance of the devices?

(4) What about series and parallel combination of energy hervesting devices? 

(5) Does the model under consideration demands additional power source to condition the harvesting devices ?

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Reviewer 3 Report

Equations formatting is required.

Author Response

Response to reviewer 3 comments

We would like to thank the reviewer for his careful and thorough reading of this manuscript.

• We have sufficiently modified the content of the introduction, especially the part concerning the modeling of the relay soft encoder output, because of its importance in this work. In addition, the contributions of the work are presented in more detail in the introduction.

• The presentation of the results in the revised version has been reworked to make them more plausible to the reader.

Our response to the comments follows.

Comments:

1) Equations formatting is required.

Response:

The equation forms in the revised version are reviewed, especially equations (12), (29) and (30) are adjusted.

Round 2

Reviewer 1 Report

The authors basically answer my questions.