A Novel Sparse Framework for Angle and Frequency Estimation

Round 1

Reviewer 1 Report

1. The contributions of this paper should be highlighted;

2. How to determine the source number K?

3. How to pair the estimated parameters?

4. Section 4 should be with capital letters;

5. ‘Ture’ in Figure 3 should be ‘True’;

6. A running time comparison should be provided;

Author Response

Please refer to the attached file.

Author Response File: Author Response.pdf

Reviewer 2 Report

This paper proposed a novel sparsity-aware framework for joint angle and frequency estimation (JAFE). The proposed algorithm is composed of the two-step ESPRIT based on the sub-Nyquist measurement. The superiority of the proposed approach is presented from the larger spatial-temporal aperture compared with the uniform sampling architectures. Overall, the topic is interesting, and the proposed solution provides interesting results. The following comments are recommended to improve the quality of the paper.

(1)  Overall, the introduction does not read smoothly. The storyline between the existing work and the methodology of this paper has not been sorted out. It is recommended to improve the presentation of the article.

(2)  In Section 1, the contributions of this article are better listed separately.

(3)  What are the limitations of the proposed methodology? Also, A brief description of future work should be given in the conclusion.

(4)  In Section 4, can you give the stability analysis of the proposed algorithm?

(5)  The survey of this paper requires further improvement. On the analysis for Cyber-Physical system, “The Vulnerability of Cyber-Physical System Under Stealthy Attacks, IEEE trans on Automatic Control”. I believe that these works may help to improve the quality of this paper.

(6)  Proofread the paper again to correct typographical errors.

Author Response

Please refer to the attached file.

Author Response File: Author Response.pdf

Reviewer 3 Report

The authors proposed a novel approach to estimate angle and frequency in which the coprime sampling was adopted instead of uniform sampling.

The topic is interesting but the length of the manuscript is quite limited which looks like a short communication rather than a research article. The authors are encouraged to extend the content of the manuscript including more details of the derivations and simulations.

Author Response

Please refer to the attached file.

Author Response File: Author Response.pdf

Reviewer 4 Report

In current work, the authors present a space-time coprime sampling framework for joint angle and frequency estimation, alongside the corresponding evaluation. They have included a complete state of the art section and the introduction smoothly prepares the reader for the rest sections. The methodology is adequately described as well as the results.

However I do have some comments on this work.

In figure 3, in the legend replace Ture->true

Place figure 6 if possible together with figures 4, 5, or above conclusion section.

Please explain how the values allocation happened for the M1, M2, N1, N2 parameters. Say also, how realistic this is in real life setups.

Author Response

Please refer to the attached file.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Everything seems good now.

Reviewer 3 Report

The authors revised the manuscript properly. The reviewer has no further comments.