Respiration Detection of Ground Injured Human Target Using UWB Radar Mounted on a Hovering UAV

Round 1

Reviewer 1 Report

The authors have presented the human respiration rate detection method using UWB radar at the UAV platform. the major comments are:

1) some variable were never used like d(t). In Eq (1) d(t) = d_0 + X(t) + d_UAV(t), however, the author used only X(t) and d_UAV. Similarly, Eqs. (10-12). 

2) what is lambda, theta and the term 4pi/lambda?

3) In eq (3), is this tau_v or tau_r? make correction.

4) line 135: tau_v

5) Eq(5): tau_v or tau_r?

6) line 169: shown in ... that illustrates the process of human respiration extraction in the outdoor injured people scenario using UWB radar.

7) In (13): what m and a here?

8) In eq(18): What is E?

9) In Figure 9, define the axis of the observed signals

10) In eq(17), x1, x2 ... are these components of the X(t)?

11) line 200: y1, y2, ... are never used. what is the difference between these two variables, y and the transmitted pulse s?

12) use present tense in the experiment section.

The paper lacks a detailed description of the given material. 

Author Response

We really thank your excellent comments and for taking the time to consider our paper. We have tried our best to revise the paper in accordance to your comments The revised content is marked in green. And for some questions, we have made corresponding explanation and we will keep studying on them.

We modified the manuscript without changing the structure and content in red.Attached file is the response letter to your comments.

Author Response File: Author Response.docx

Reviewer 2 Report

The paper is interesting and timely, the methods souns and solid. The paper can be accepted.

Author Response

 We really thank  for your excellent comments and for taking the time to consider our paper.We modified the manuscript without changing the structure and content in red.Attached file is the response letter to your comments.

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

Thank you for providing detail comments. I really appreciate your hard work. Since, the authors have addressed all the comments, therefore, it is recommended to accept the paper in current format.