A Study of Direction-of-Arrival Estimation with an Improved Monopulse Ratio Curve Using Beamforming for an Active Phased Array Antenna System

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Please see the attached file.

Comments for author File: Comments.pdf

Author Response

Manuscript Tile: A Study on DOA Estimation based on the Beamforming Technique for Active Phased Array Antenna System

Revised Manuscripts Title: A Study of Direction-of-Arrival Estimation with Improved Monopulse Ratio Curve using Beamforming for Active Phased Array Antenna System

Authors appreciate the detailed comments of the reviewer. In response to reviewers' comments, we made the following revisions to our manuscript. In order to improve the readability, an English grammar proofreading company was supervised. Based on the English editing certification, we revised the title of manuscript as above.

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

1. The adopted antenna is not explicitly described. More details are needed. Such as working frequency, bandwidth, etc.

2. How is the monopulse algorithm implemented in the adopted antenna? What is the connnection between beamforming with antenna configuration?

3. A Pseudocode is needed to demonstrate the proposed improved monopulse algorithm.

4. More related literature on specific spectrum and use case can be included, such as follow:

[1]  "A MmWave communication testbed based on IEEE 802.11ad with scalable PtMP configuration," in China Communications

[2] "Reconfigurable Intelligent Surface for Near Field Communications: Beamforming and Sensing," in IEEE Transactions on Wireless Communications

5. The figures are not clear enough.

Comments on the Quality of English Language

The english can be polished by native speaker.

Author Response

Manuscript Tile: A Study on DOA Estimation based on the Beamforming Technique for Active Phased Array Antenna System

Revised Manuscripts Title: A Study of Direction-of-Arrival Estimation with Improved Monopulse Ratio Curve using Beamforming for Active Phased Array Antenna System

Authors appreciate the detailed comments of the reviewer. In response to reviewers' comments, we made the following revisions to our manuscript. In order to improve the readability, an English grammar proofreading company was supervised. Based on the English editing certification, we revised the title of manuscript as above.

Author Response File: Author Response.pdf

Reviewer 3 Report

Comments and Suggestions for Authors

The authors propose a novel technique for DOA estimation for airborne-based communication systems. Advantages of the article: 1) A novel method of monopulse curve linearisation technique is offered. 2) The method of DOA destination is implemented, and its operation is verified. 3) The accuracy of angle estimation is assessed. Disadvantages of the article: 1) The direct comparison with other DOA estimation techniques is strongly recommended. 2) Especially the authors should compare the computational complexity of the methods. 3) The reviewer detected some minor typos, e.g. “exp” in italics in equation (15).

Comments on the Quality of English Language

English is good.

Author Response

Manuscript Tile: A Study on DOA Estimation based on the Beamforming Technique for Active Phased Array Antenna System

Revised Manuscripts Title: A Study of Direction-of-Arrival Estimation with Improved Monopulse Ratio Curve using Beamforming for Active Phased Array Antenna System

Authors appreciate the detailed comments of the reviewer. In response to reviewers' comments, we made the following revisions to our manuscript. In order to improve the readability, an English grammar proofreading company was supervised. Based on the English editing certification, we revised the title of manuscript as above.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The authors have well addressed my concerns, no further comments.

Reviewer 2 Report

Comments and Suggestions for Authors

The authors have well addressed my concerns.

Another suggestion is that the figures can be more clear, such as using vector pictures.

Comments on the Quality of English Language

the english is ok