Synchronization of Analog-Discrete Chaotic Systems for Wireless Sensor Network Design

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

Figures 20 and 21: It is difficult to determine what the figures show. The horizontal axis should be more zoomed in. For example, for Fig 20, showing only first 1000 samples (instead of 5200) would be better. The number of samples should probably be even lower, because the syncronization times cannot be determined. Authors have stated that "The synchronization time is taken as the time between the start of synchronization and the moment when correlation reaches 80 % of the maximum level of synchronization at the given noise level." These time and corelation intervals should be marked on the figures. Also, it would help to mark the switch positions on figures 20 and 21.

For which state variable is corelation coefficient (beta) given on figs 20 and 21?

Why isn't there s syncronization time analysis for Vilnius circuit? Figs 20 and 21 are for RC.

The ending of the following sentence should be changed (it seem that something is missing): "The synchronization time is taken as the time between the start of synchronization and the moment when correlation reaches 80 % of the maximum level of synchronization at the given noise level; the desynchronization time is measured."

How is desynchronization time measured?

Author Response

Thank You for the review. Here is how we have addressed the questions and suggestions in the revised manuscript:

1) Thank you for the suggestion regarding Figures 20 and 21. They have been redrawn and the text updated.

2) "For which state variable is correlation coefficient (beta) given on figs 20 and 21?"

It is for z state variable; the figure captions were updated

3) "Why isn't there s syncronization time analysis for Vilnius circuit? Figs 20 and 21 are for RC."

It is important to note that Figures 20 and 21 only demonstrate how the synchronization and desynchronization times are measured in simulation and hardware. The actual analysis is in Figures 22 and 23.

4) The sentence on desynchronization time was also corrected. 

Reviewer 2 Report

Comments and Suggestions for Authors

This work studies two key parameters of analog-discrete chaotic synchronization: chaotic synchronization noise immunity and synchronization speed, using simulation-based and hardware-based approaches. The work has a certain degree of innovation and has been analyzed comprehensively. But there are still the following issues that need to be improved.

1. What the vertical axis represents in Figure 17 should be represented.

2. Fig 13(a) and (b) have the same name.

3. in the noise analysis part, why the correlations are different from x2 and z2? why don't add the noise on x or z, to analyze y?

 

4. Since the author has conducted a hardware experiment, pictures of the hardware experiment should be provided, and the parameters of each component in the circuit should also be provided.

Comments on the Quality of English Language

This work studies two key parameters of analog-discrete chaotic synchronization: chaotic synchronization noise immunity and synchronization speed, using simulation-based and hardware-based approaches. The work has a certain degree of innovation and has been analyzed comprehensively. But there are still the following issues that need to be improved.

1. What the vertical axis represents in Figure 17 should be represented.

2. Fig 13(a) and (b) have the same name.

3. in the noise analysis part, why the correlations are different from x2 and z2? why don't add the noise on x or z, to analyze y?

 

4. Since the author has conducted a hardware experiment, pictures of the hardware experiment should be provided, and the parameters of each component in the circuit should also be provided.

Author Response

Thank You for the review. Here is how the revised manuscript addresses the questions and suggestions:

1) The text analyzing the results in Figures 16 and 17 was updated; now, what is displayed on the y-axis is clearer.

2) There was a mistake with Figure 13's caption; now it is corrected.

3) "in the noise analysis part, why the correlations are different from x2 and z2? why don't add the noise on x or z, to analyze y?"
The revised manuscript now clarifies both questions. The x2 and z2 have different synchronization noise immunity due to the difference in their waveforms. The noise analysis on y wasn't performed the same way as with x and z because y is dedicated to synchronization. It was found that only this state variable can be used for synchronization for the two oscillators.

4) Yes, we were initially considering placing the pictures from hardware measurements. However, the abundance of wires made them less informative than the drawn setups in Figures 13, 15, and 19. These figures show everything for the setup and describe every component there is. So, in the end, the drawn setups drastically improved the manuscript's readability.

Two photos of the experimental setup are attached to clarify the point.

Author Response File: Author Response.docx