Mitigation of Millimeter-Wave Radar Mutual Interference Using Spectrum Sub-Band Analysis and Synthesis

Round 1

Reviewer 1 Report

The paper presents the mitigation of millimeter-wave radars mutual interference using spectrum subband. The paper is interesting, however some matters need to be addressed before publication.

1. A better explanation of your contribution needs to be added in the Introduction Section. Please set differences of your work with respect to previous work. Please highligh the advantages, benefits and contributions of the new tecnique and results.

2. Provide more details of the methodology used. You must highligh the differences of your methodology with respect to the state of art.

3. It is needed a better description of the results. Please highligh the benefits, the advantages and contributions of your proposal.

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

The underlying manuscript proposes a novel solution to the problem of mutual radar interference based on the analysis and synthesis of spectrum subbands where interference mitigation is carried out in each subband and the signals are reconstructed to obtain interference-free data. The effectiveness of this approach is evaluated using both simulated multi-target scenario and real-life experiments. Overall, the work is well written. My comments are as follows

1. What are m and M in Fig.1?

2. The word 'diagram' can be removed from the title of figures 4 and 5.

3. 'else' in Eq. 10 can be replaced by 'otherwise'

4. Please check the notations log10 in eqs. 12-13. 

Author Response

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Author Response File: Author Response.pdf

Reviewer 3 Report

I really like the work you did here. It is relatively rare to see nice hands-on projects these days.

 

Following items are several suggestions:

·      Page 8, Lines 221 and 222: section 4 is dedicated to the simulation, so maybe title should not include word “Experiment”, just “Results of the Simulation”. You have experiment in the Section 5. Similarly, Subsection 4.1: maybe rename it to “Simulation Setup”.

 

·      In your signal analysis, especially Equation (2), you do not include Doppler shift component of the echo signal (e.g., echo coming from the vehicle that moves with respect to your radar). However, later in the simulation, you do simulate ranges and velocities (Dopplers) of the interferers. Can you add a sentence or two about that, even if it is just to say that Doppler is ignored for simplicity’s sake? Somewhere around Equation (2) maybe?

 

·      Page 9, Line 263: Generic Signal-to-Noise ratio (SNR) is an established scientific quantity. Your proposed quantity (Equation 12) has an acronym SINR, but you are still call it “Signal-To-Noise ratio”. Would it be possible to maybe rename it somewhat, so it does not get confused with standard meaning of the SNR?

 

The paper is nicely written. I may have found one typo:

 

Page 4, Line 147: no need for “Where” at the beginning of the sentence. It should be: “The first term is the target echo in the form of a single frequency, and the second and third terms are the interference.”

Author Response

Please see the attachment.

Author Response File: Author Response.pdf