Joint Radar-Communication Optimization of Distributed Airborne Radar for AOA Localization
Round 1
Reviewer 1 Report
The manuscript deals with the joint radar-communication optimization (JRCO) algorithm for utilizing the electromagnetic domain resources of a group of UAVs. This algorithm is well explained and thoroughly tested by simulations.
The manuscript is well-written, self-explainable and readable with ordinary effort. Its length is adequate, and the chapters have adequate length. The introduction is apparent, and it cites actual references. Research is backed by mathematic apparatus. The work with a template is also sufficient.
However, some minor problems need to be fixed:
1. Figure 4 - the a) figure is bigger than b) and c)
2. The caption of the axis in Figure 3 is in Chinese.
3. The references are not in desired MDPI format.
4. The conclusion should include this method's potential disadvantages.
The English language seems to be OK.
Author Response
Please find the attached document.
Author Response File: 
Author Response.docx
Reviewer 2 Report
Dear Authors,
Your article entitled: "Joint Radar-Communication Optimization of Distributed Airborne Radar for AOA Localization" presents an interesting contribution to the operationalization of a DAR system operating in conjunction with UAVs. The structure of the article is adequate, however, the development of the main equations could be better illustrated, which would facilitate the understanding of the deductions. Excerpts of the text that should be improved were pointed out in the comments of the digital file. I request your attention to the following questions:
1) Line 172: “method to maximize the accuracy of target location estimation”. Does this accuracy improvement refer to the target position? Considering the current scenario, could this improvement be reflected in a metric? Please elaborate on this statement.
2) Line 180: “Time slots in total.”. Please detail. Is there a limit to the number of slots?
3) Line 183: “The location coordinate of the i -th UAV”. In this case only the two-dimensional position of the UAV? What is the implication of this three-to-two-dimensional simplification?
4) Present the bibliographical references for the presented equations.
5) Lines 218 to 221: present the bibliographical references that allow us to obtain more details about the proposed topologies.
6) Figure 3: Please use the English language in the y-axis nomenclature.
7) Please present the hardware and software resources used to generate the results presented in Chapter 4.
8) Line 434: “In the case of the neighboring i M UAVs forming a network together, based on the geometric relationship between each UAV and the target”. Would it be possible to present a Figure of this situation and the components that generated equation 31? It would make deducing the equation more deductive.
9) Line 485: “Are Gaussian random variables”. What is the preliminary theoretical or empirical subsidy that made possible the statement about this distribution of probabilities?
10) Table 3: the values in the table considered some bibliographic reference or obtained empirically. Please justify.
The results can be better explored if they are confronted with the available solutions presented in the bibliographical references.
I conclude by congratulating them for the work and mathematical development produced.
Respectfully,
Please pay attention to the correct use of punctuation, especially the comma. Avoid using long paragraphs as they tend to make reading confusing. It is also necessary to review the verbal agreement and use of tense.
Author Response
Please find the attached document
Author Response File: Author Response.docx
Reviewer 3 Report
this article proposes a joint optimization algorithm for radar detection-communication transmission of DAR.
since uav move in the sky, the AOA is measured in 3d space, not in 2d plane.
the paper is lack of literature review on AOA localization. contributions of this paper compared to the papers on AOA localization are not clear to me.
computational load of this paper needs to be compared to that of the state of the art on AOA localization. can you run your method in real time?
what is the effect of increasing the number of drones?
In Control group 1 (Sheng Xu's method), can you provide references?
in section 4, can you depict the position of each UAV and the target?
which sensor is used for uav position measurement? 0.01 meter position measurement error? I think this position error is too small. what is the effect of position measurement error?
can you present the references supporting how realistic parameters in table 3 are?
For AOA measurements, which radar are used in practice? what is the accuracy of the radar? what is the maximum sensing range?
which communication system is considered in practice? 15 meter communication range seems to be too short.
experiments are missing in this paper.
ok
Author Response
Please find the attached document
Author Response File: Author Response.docx
Round 2
Reviewer 3 Report
I am satisfied with revision.
I am satisfied
