Millimeter-Wave Radar Detection and Localization of a Human in Indoor Complex Environments

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

This article presents an approach to detect and locate a static human indoors using a millimeter-wave radar. Here are some improvements for authors' consideration.

1. It is recommended to provide a more comprehensive review of the relevant research literature, including more recent and representative references for comparison. For example, the primary  comparative literatures [25] and [26] are notably outdated.

2. The writing should be further improved. For example, when comparing formula (8) with formula (5), an explanation is needed as to why the third term, 2SR^2/C^2, can be ignored, and why does formula (13) not take the influence of velocity into consideration? In line 291, it is necessary to explain why the wavelength is 3.896 mm and provide specific information about the radar wavelength.

3. For Figures 21 and 22, it is recommended to combine the results of the possible target distribution and the real target distribution into a single figure to better illustrate theaccuracy of the results.

4. More detailed information about the radar system is recommended. What type of radar does the system use?  Is it a self-developed radar system or does it rely on evaluation boards provided by companies such as TI?

5. The novelties and original technique contributions should be further highlighted.

Comments on the Quality of English Language

It is recommended that the authors provide further elaboration on the novelty of the work and its specific contribution.

Author Response

Required Reviews Completed

Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

Main Contribution of the Research Paper: The main contributions of the research paper include:

1. Proposing a method that combines non-target signal removal and human localization for accurate indoor human detection and localization using a 77GHz millimeter-wave radar.

2. Mitigating time-variant clutter through point clustering and reducing ghost targets based on propagation path matching.

3. Achieving effective detection and localization of human targets even in complex indoor environments with green plants, curtains, or furniture, outperforming conventional methods.

Suggestions for Improving the Paper

• Provide detailed explanations of the point clustering and propagation path matching techniques used for clutter mitigation.
• Include a more detailed comparison with other state-of-the-art methods to showcase the superiority of the proposed approach.
• Discuss the limitations of the proposed method and potential areas for future research.
• Provide a more detailed explanation of the experimental setup and methodology used in the study.
• Include statistical analysis of the experimental results to support the effectiveness of the proposed method.
• Discuss the impact of varying radar parameters on the detection and localization accuracy.
• Include real-world scenarios or case studies to demonstrate the practical applicability of the proposed method.
• Discuss the computational complexity of the proposed method and potential ways to optimize it.
• Consider including a section on the potential challenges faced during the implementation of the proposed method and how they were addressed.

Comments on the Quality of English Language

Can be improved.

Author Response

Required Reviews Completed

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Comments and Suggestions for Authors

The authors considered my comments and suggestions 

Comments on the Quality of English Language

A final proofread would be useful.