An Efficient 3-D Ray Tracing Method: Prediction of Indoor Radio Propagation at 28 GHz in 5G Network
Round 1
Reviewer 1 Report
The revised carefully addressed my previous comments. I would recommend to accept the paper as it is.
Author Response
Dear Sir/Madam,
have a good day,
Thanks a lot for your support.
Your valuable comments help us to express our research more clearly to the readers. We appreciated your previous comments on the manuscript to improve that paper standard
With thanks,
Ferdous Hossain,
MMU, Malaysia
Reviewer 2 Report
The quality of the paper has been improved in the revised version. I recommend to accept this paper.
Author Response
Dear Sir/Madam,
have a good day,
Thanks a lot for your support.
Your valuable comments help us to express our research more clearly to the readers. We appreciated your previous comments on the manuscript to improve that paper standard
With thanks,
Ferdous Hossain,
MMU, Malaysia
This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.
Round 1
Reviewer 1 Report
The antenna used for mmWave communication plays a critical role. Please explain why horn and omni antenna are used for the measurement experiments? Usually multi-array antenna with various beamforming technologies are used for improve the mmWave communications. It is highly recommended that some other types of antenna or antenna arrays be used in the experiments.
Author Response
Dear Sir,
Have a good day,
Thanks a lot for your kind co-operations.
Your valuable comments help us to express our research more clearly to the readers. We appreciated your comments on the manuscript to improve that paper standard. Please find the response of the comment as below.
Reviewer 1:
SL | Comments | Author Response |
1 | The antenna used for mmWave communication plays a critical role. Please explain why horn and omni antenna are used for the measurement experiments? Usually multi-array antenna with various beamforming technologies are used for improve the mmWave communications. It is highly recommended that some other types of antenna or antenna arrays be used in the experiments. | In our wireless communication centre, we carried out Continuous Wave (CW) signal measurement by using SISO system. Generally, in CW measurements horn-omni, horn-horn, and omni-omni antennas are used. The measurement(horn-omni) data we used in our article is only to validate our proposed optimum ray tracing method. From this measurement camping, we got receiver-wise Receiver Signal Strength(RSSI) and pathloss. Due to equipment limitation, we did not used multi-array antenna. However, our proposed method simulation can generate power delay profile, but because of CW measurement we did not present this data in this paper. In simulation calculation, we used vector sum to get receiver wise accumulated RSSI as measurement from multiple paths. |
With thanks,
Ferdous Hossain,
Faculty of Engineering Technology
Multimedia University, Malaysia
Author Response File: Author Response.pdf
Reviewer 2 Report
In this paper, the authors proposed a 3D ray tracing method, which has been validated by comparing with measurement data. The paper covers a timely and interesting topic, and it is well-organized. This reviewer has only one request/comment: it would be better for readers to exploit the results if the authors could add a discussion section to explain the applicability of the proposed method and how to relate with statistical channel models widely used in standardization.
Author Response
Dear Sir,
Have a good day,
Thanks a lot for your kind co-operation.
Your valuable comments help us to express our research more clearly to the readers. We incorporated all the comments in the manuscript to improve that paper standard. Please find the response of comments as below.
Reviewer 2:
SL | Reviewer comments | Author Response |
1 | In this paper, the authors proposed a 3D ray tracing method, which has been validated by comparing with measurement data. The paper covers a timely and interesting topic, and it is well-organized. This reviewer has only one request/comment: it would be better for readers to exploit the results if the authors could add a discussion section to explain the applicability of the proposed method and how to relate with statistical channel models widely used in standardization. | Our proposed method is able to produce the useful channel information such as Receiver Signal Strength (RSSI), path loss etc. It can provide more accurate scenario wise result in comparison the Empirical Statistical Methods. Moreover, the main disadvantage of Empirical Statistical model is lower accuracy as they did not consider specific scenario wise propagation. Our method belongs in Site Specific models so it helps to overcome the limitations of Statistical models. This method is faster; as we optimized the calculation phase, so it overcome the computational so called limitation of site specific methods also. Please see the revised manuscript line 510-515 for more details |
With thanks,
Ferdous Hossain,
Faculty of Engineering Technology
Multimedia University, Malaysia
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
I strongly believe multi-array antenna will be used for mmWave communications. And it is kind os strange to use only SISO for the experiment. Even if the experiment is too limited, at least some simulations should be provided to justify your proposed solution.
Author Response
Dear Sir,
Have a good day,
Thanks a lot for your kind co-operation.
Your valuable comments help us to express our research more clearly to the readers. We appreciated your comments on the manuscript to improve that paper standard. Please find the response of the comment as below.
Reviewer 1:
SL | Comments | Author Response |
1 | I strongly believe multi-array antenna will be used for mmWave communications. And it is kind os strange to use only SISO for the experiment. Even if the experiment is too limited, at least some simulations should be provided to justify your proposed solution. | Your suggestions are highly appreciated. However, the focus of this paper on ray tracing method development which belongs to on site-specific models in radio propagation. We have and had to use our existing equipment to verify our results because of resource limitation. In this circumstance, we think our measurement can serve the purpose to verify ray tracing result as our focus is not measurement. Multi-array antenna is used in channel sounding where need additional equipment such as fast speed multiplexer, etc. Moreover, to process the raw data need to use- super resolution algorithm such as Multiple Signal Classification (MUSIC), Estimation of Signal Parameters via Rotational Invariance Technique (ESPRIT), MATRIX PENCIL etc. to estimate the direction-of-arrival. It is out of our current project scope.
As per your valued directions we added proposed optimum method’s some mobile stations simulations PDP in a Table. Please see the Table 6 and line number 497 to 503 for more details. Many thanks in advance for your understanding and considerations.
|
With thanks,
Ferdous Hossain,
Faculty of Engineering Technology
Multimedia University, Malaysia
Author Response File: Author Response.pdf
Round 3
Reviewer 1 Report
The title of the table 6 reads awkward. The English presentation needs great efforts for improvement. In addition, is there any base line algorithm for comparison in table 6?
Author Response
Dear Sir,
Have a good day,
Thanks a lot for your kind co-operations.
Your valuable comments help us to express our research more clearly to the readers. We appreciated your comments on the manuscript to improve that paper standard. Please find the response of the comment as below.
Reviewer 1:
SL | Comments | Author Response |
1 | The title of the table 6 reads awkward. The English presentation needs great efforts for improvement. In addition, is there any base line algorithm for comparison in table 6? | The table 6 title has been updated. The manuscript has been copy edited for language usage, spelling, and grammar by Dr. Tawfig Ahmad A. Eltaif who is the senior lecturer of Faculty of Engineering Technology at Multimedia University, Melaka Malaysia. Our proposed method simulation output is presented in table 6. No base line is algorithm is available for compare table 6 data, as it generated by our own proposed algorithm. It can be compare with SBRT algorithm if all parameters including layout are same.
|
With thanks,
Ferdous Hossain,
Faculty of Engineering Technology
Multimedia University, Malaysia
Author Response File: Author Response.pdf