Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482229
Yunwei Pu, Jiang Guo, Taotao Liu, Haixiao Wu
Aiming at many problems of complex radar emitter signal recognition methods, like poor anti-noise performance and low recognition rate. In this paper, a new recognition method based on contour lines of ambiguity function and stacked denoising auto-encoders is proposed. First, an ambiguity function is processed by the Gaussian smoothing and calculate contour lines by linear interpolation. Then, principal component analysis is used to reduce its feature dimension, retain the main ambiguity energy information. Finally, deep learning stacked denoising auto-encoders are built to learn and extract the deep and more ubiquitous features of contour lines, and classify them through the Softmax classifier. The simulated experiments show that the overall average recognition rate of the six typical radar signals is maintained above 99.83% when the signal-noise ratio is 0dB. Even in the -6dB environment, it also can reach 83.67%, which proves this method has good performance and feasibility under the extremely low signal-noise ratio conditions.
{"title":"Radar Emitter Signal Recognition based on Contour Lines of Ambiguity Function and Stacked Denoising Auto-encoders","authors":"Yunwei Pu, Jiang Guo, Taotao Liu, Haixiao Wu","doi":"10.1109/IMCEC51613.2021.9482229","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482229","url":null,"abstract":"Aiming at many problems of complex radar emitter signal recognition methods, like poor anti-noise performance and low recognition rate. In this paper, a new recognition method based on contour lines of ambiguity function and stacked denoising auto-encoders is proposed. First, an ambiguity function is processed by the Gaussian smoothing and calculate contour lines by linear interpolation. Then, principal component analysis is used to reduce its feature dimension, retain the main ambiguity energy information. Finally, deep learning stacked denoising auto-encoders are built to learn and extract the deep and more ubiquitous features of contour lines, and classify them through the Softmax classifier. The simulated experiments show that the overall average recognition rate of the six typical radar signals is maintained above 99.83% when the signal-noise ratio is 0dB. Even in the -6dB environment, it also can reach 83.67%, which proves this method has good performance and feasibility under the extremely low signal-noise ratio conditions.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122181769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482222
Bakun Zhu, Weigang Zhu, Wei Li, Tianhao Gao
Real-time and accurate evaluation of jamming effect is the key to implement intelligent jamming decision. The existing evaluation method of jamming effect based on radar side is too rough to serve the problem of radar jamming intelligent decision. Based on the syntactic model, a four-layers multi-functional radar signal mode (FMRSM) is proposed in this paper. By analyzing the behavior rules of multi-functional radar(MFR) in the process of radar countermeasure, an online evaluation model of multifunctional radar jamming effect is proposed in combination with FMRSM. The effectiveness of the jamming effect evaluation method is proved by experimental simulation under the background of aircraft penetration.
{"title":"An On-line Evaluation Method of Multi-Functional Radar Jamming Effect","authors":"Bakun Zhu, Weigang Zhu, Wei Li, Tianhao Gao","doi":"10.1109/IMCEC51613.2021.9482222","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482222","url":null,"abstract":"Real-time and accurate evaluation of jamming effect is the key to implement intelligent jamming decision. The existing evaluation method of jamming effect based on radar side is too rough to serve the problem of radar jamming intelligent decision. Based on the syntactic model, a four-layers multi-functional radar signal mode (FMRSM) is proposed in this paper. By analyzing the behavior rules of multi-functional radar(MFR) in the process of radar countermeasure, an online evaluation model of multifunctional radar jamming effect is proposed in combination with FMRSM. The effectiveness of the jamming effect evaluation method is proved by experimental simulation under the background of aircraft penetration.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124705259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482105
Hongyu Wang, B. Yao, Jing Su, Wan-Jia Zhang
For letting graphic lattices approaching lattices, we define imaginary graphs and the leaf-splitting operation and the leaf-coinciding operation, and show an equivalent property: The leaf-splitting connectivity of a connected im-graph is equivalent to its edge connectivity. Using im-graphs produce complex degree-sequence lattices, graphic lattices, im-graphs in the integer decomposition problem, topological IoT-networks and data-functional IoT-networks. Each integer m with |m| ≥ 2 corresponds at least a graph or an im-graph. We try to build some connections between popular lattices and our lattices, and moreover propose some problems on Hanzi-writings lattices constructed by Chinese character coding.
{"title":"Number-Based Strings/Passwords From Imaginary Graphs Of Topological Coding For Encryption","authors":"Hongyu Wang, B. Yao, Jing Su, Wan-Jia Zhang","doi":"10.1109/IMCEC51613.2021.9482105","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482105","url":null,"abstract":"For letting graphic lattices approaching lattices, we define imaginary graphs and the leaf-splitting operation and the leaf-coinciding operation, and show an equivalent property: The leaf-splitting connectivity of a connected im-graph is equivalent to its edge connectivity. Using im-graphs produce complex degree-sequence lattices, graphic lattices, im-graphs in the integer decomposition problem, topological IoT-networks and data-functional IoT-networks. Each integer m with |m| ≥ 2 corresponds at least a graph or an im-graph. We try to build some connections between popular lattices and our lattices, and moreover propose some problems on Hanzi-writings lattices constructed by Chinese character coding.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131542812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482166
Wenyuan Zhao, YunChang Cheng, Yufang Tang, Dandan Li
With the acceleration of informatization, more and more tool software and application systems are born. The systems are independent of each other, with different structures, and there are a lot of messages. System users often have to switch between the systems to see if there are tasks that need to be processed. There is no unified message entry or message reminder, and more and more systems are used. Burden. Use message middleware to centrally distribute various system tasks, and use system automatic push to remind users of message processing in real time to increase system efficiency and reduce message processing and receiving time. Synchronous/asynchronous sending and receiving of distributed applications and traditional applications, as well as unified communication interface specifications for applications, ensure the continuity and spreadability of the system. At the same time, it ensures that the messages sent and received are accurate and reliable under the condition of heterogeneous and multi-systems, reducing the coupling between the business system and the processing system, and playing a role of loose coupling.
{"title":"Design and pragtfctice of heterogeneous multi-system message center","authors":"Wenyuan Zhao, YunChang Cheng, Yufang Tang, Dandan Li","doi":"10.1109/IMCEC51613.2021.9482166","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482166","url":null,"abstract":"With the acceleration of informatization, more and more tool software and application systems are born. The systems are independent of each other, with different structures, and there are a lot of messages. System users often have to switch between the systems to see if there are tasks that need to be processed. There is no unified message entry or message reminder, and more and more systems are used. Burden. Use message middleware to centrally distribute various system tasks, and use system automatic push to remind users of message processing in real time to increase system efficiency and reduce message processing and receiving time. Synchronous/asynchronous sending and receiving of distributed applications and traditional applications, as well as unified communication interface specifications for applications, ensure the continuity and spreadability of the system. At the same time, it ensures that the messages sent and received are accurate and reliable under the condition of heterogeneous and multi-systems, reducing the coupling between the business system and the processing system, and playing a role of loose coupling.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134574829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482324
Xiang Jiang, Haixian Wang
As the cornerstone of natural sciences, mathematics influences and changes our technology oriented world in systematic and progressive ways. The importance of fostering and developing mathematically gifted children/adolescents has been acknowledged widely. Spectral measures of linear Granger causality have been widely applied to study the causal connectivity between time series data in neuroscience, biology, and economics. Traditional Granger causality measures are based on linear autoregressive with exogenous inputs models of time series data, which cannot truly reveal nonlinear effects in the data especially in the frequency domain. In this paper, we used nonlinear Granger causality based on kernel methods to study the effective connectivity between the frontal brain area and the posterior brain area in the mathematical frontoparietal network system during deductive reasoning tasks. It was founded that the frontoparietal regions of the math-gifted show stronger working memory information processing at the θ-band and math-gifted group show more significant increase in the mid-front brain area and the posterior parietal area compared with control group.
{"title":"Analysing Effective Connectivity of the Math-gifted Brain with Nonlinear Granger Causality","authors":"Xiang Jiang, Haixian Wang","doi":"10.1109/IMCEC51613.2021.9482324","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482324","url":null,"abstract":"As the cornerstone of natural sciences, mathematics influences and changes our technology oriented world in systematic and progressive ways. The importance of fostering and developing mathematically gifted children/adolescents has been acknowledged widely. Spectral measures of linear Granger causality have been widely applied to study the causal connectivity between time series data in neuroscience, biology, and economics. Traditional Granger causality measures are based on linear autoregressive with exogenous inputs models of time series data, which cannot truly reveal nonlinear effects in the data especially in the frequency domain. In this paper, we used nonlinear Granger causality based on kernel methods to study the effective connectivity between the frontal brain area and the posterior brain area in the mathematical frontoparietal network system during deductive reasoning tasks. It was founded that the frontoparietal regions of the math-gifted show stronger working memory information processing at the θ-band and math-gifted group show more significant increase in the mid-front brain area and the posterior parietal area compared with control group.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134293281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482365
Hailan Yu, Weili Chen
Magnetic resonance imaging (MRI) images have high tissue resolution and rich contrast, and are important data for the study of hippocampal morphology. The hippocampal volume can not achieve the ideal segmentation effect in human brain MRI images, and few people have studied the 3D reconstruction of human brain MRI. An improved 3D-Unet medical image processing is proposed in this paper. Through the establishment of 3D segmentation algorithm, the 3D reconstruction and visualization of brain tissue are realized, and the linkage between segmentation algorithm and 3D visualization system is realized. Experiments show that the improved algorithm has high recognition rate and strong adaptability.
{"title":"Research on 3D Medical Image Segmentation based on improved 3D-Unet","authors":"Hailan Yu, Weili Chen","doi":"10.1109/IMCEC51613.2021.9482365","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482365","url":null,"abstract":"Magnetic resonance imaging (MRI) images have high tissue resolution and rich contrast, and are important data for the study of hippocampal morphology. The hippocampal volume can not achieve the ideal segmentation effect in human brain MRI images, and few people have studied the 3D reconstruction of human brain MRI. An improved 3D-Unet medical image processing is proposed in this paper. Through the establishment of 3D segmentation algorithm, the 3D reconstruction and visualization of brain tissue are realized, and the linkage between segmentation algorithm and 3D visualization system is realized. Experiments show that the improved algorithm has high recognition rate and strong adaptability.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134352234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482248
Weibin Hou, Bin Du, Qi Wang, Jie Zhou, Weiping Shao, Weijun Zheng, Jiadong Du
long term evolution (LTE) has been widely using in power wireless private network. As safety and reliability are the basic requirements of power wireless private network, systems should reoperate and key user equipment should be re-connected as soon as possible after some unexpected situations, for example power down and power on for an evolved Node B. Therefore, an optimized scheme of random access (RA) procedure for TD-LTE power wireless private network was presented in this paper. Referring to specific priorities about different power services, distributions of preambles during random access process were optimized when power wireless private network suffering unexpected situations. Combining with realistic power services, a reserve plan was capable be achieved by using this scheme. With this scheme, high priority services could be re-connected to the system in time, and other services could also be re-connected as much as possible, the reliability of power wireless private network was improved.
{"title":"An Optimized Scheme of Random Access Procedure for Power Wireless Private Network","authors":"Weibin Hou, Bin Du, Qi Wang, Jie Zhou, Weiping Shao, Weijun Zheng, Jiadong Du","doi":"10.1109/IMCEC51613.2021.9482248","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482248","url":null,"abstract":"long term evolution (LTE) has been widely using in power wireless private network. As safety and reliability are the basic requirements of power wireless private network, systems should reoperate and key user equipment should be re-connected as soon as possible after some unexpected situations, for example power down and power on for an evolved Node B. Therefore, an optimized scheme of random access (RA) procedure for TD-LTE power wireless private network was presented in this paper. Referring to specific priorities about different power services, distributions of preambles during random access process were optimized when power wireless private network suffering unexpected situations. Combining with realistic power services, a reserve plan was capable be achieved by using this scheme. With this scheme, high priority services could be re-connected to the system in time, and other services could also be re-connected as much as possible, the reliability of power wireless private network was improved.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132523140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482234
Pengfei Sheng, Qi Yin, Y. Shen
Aiming at the problem that methods based on background templates in existing substation scenes cannot completely detect salient targets with similar characteristics in some areas and the background, a salient target integrity detection method based on contour detection is proposed. First, extract the initial contours of the input image, use the proposed virtual connection-based contour processing scheme to merge adjacent contours and remove isolated contours, and use the designed shortest path-based closed-loop search scheme to merge the contours with longer distances to obtain Saliency map for contour detection. Then, an adaptive threshold segmentation algorithm is used to process the saliency map based on background template suppression to obtain the binarized saliency map and the salient pixels. By removing the complete area of the contour with the proportion of salient pixels smaller than the specified threshold, an optimized saliency map based on contour detection is obtained. Finally, merge it with the binarized saliency map to obtain a complete saliency map. The results prove that the method in this paper can obtain a better saliency map for images where the saliency target is located at any position.
{"title":"Image saliency detection method for safe operation of substation","authors":"Pengfei Sheng, Qi Yin, Y. Shen","doi":"10.1109/IMCEC51613.2021.9482234","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482234","url":null,"abstract":"Aiming at the problem that methods based on background templates in existing substation scenes cannot completely detect salient targets with similar characteristics in some areas and the background, a salient target integrity detection method based on contour detection is proposed. First, extract the initial contours of the input image, use the proposed virtual connection-based contour processing scheme to merge adjacent contours and remove isolated contours, and use the designed shortest path-based closed-loop search scheme to merge the contours with longer distances to obtain Saliency map for contour detection. Then, an adaptive threshold segmentation algorithm is used to process the saliency map based on background template suppression to obtain the binarized saliency map and the salient pixels. By removing the complete area of the contour with the proportion of salient pixels smaller than the specified threshold, an optimized saliency map based on contour detection is obtained. Finally, merge it with the binarized saliency map to obtain a complete saliency map. The results prove that the method in this paper can obtain a better saliency map for images where the saliency target is located at any position.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":" 371","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131977699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482136
Cheng Yang, Y. Xue
Image segmentation plays an important role in many aspects of medical image analysis, especially in computer-aided diagnosis. In order to obtain a more accurate target contour, solve the problem that the level set method is sensitive to the initial contour, and make the algorithm more robust to noise, this thesis uses the guided filter fuzzy clustering algorithm to perform image pre-segmentation, and then combines with the level set model based on local area fitting information. First, the fuzzy clustering algorithm is used to obtain the control parameters of the level set evolution. Then, combined with the local neighborhood characteristics of the image points, the regional term coefficients and edge stop functions of the level set model are improved. Finally, the Gaussian Laplacian energy term is introduced to enhance the edge information of the target. Experiments have proved that the algorithm model proposed in this thesis realizes the automation of the initial contour of the level set, and at the same time improves the accuracy of segmentation, and is more robust to noise.
{"title":"Level set segmentation method based on local area fitting information and guided filter fuzzy clustering","authors":"Cheng Yang, Y. Xue","doi":"10.1109/IMCEC51613.2021.9482136","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482136","url":null,"abstract":"Image segmentation plays an important role in many aspects of medical image analysis, especially in computer-aided diagnosis. In order to obtain a more accurate target contour, solve the problem that the level set method is sensitive to the initial contour, and make the algorithm more robust to noise, this thesis uses the guided filter fuzzy clustering algorithm to perform image pre-segmentation, and then combines with the level set model based on local area fitting information. First, the fuzzy clustering algorithm is used to obtain the control parameters of the level set evolution. Then, combined with the local neighborhood characteristics of the image points, the regional term coefficients and edge stop functions of the level set model are improved. Finally, the Gaussian Laplacian energy term is introduced to enhance the edge information of the target. Experiments have proved that the algorithm model proposed in this thesis realizes the automation of the initial contour of the level set, and at the same time improves the accuracy of segmentation, and is more robust to noise.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133379368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-18DOI: 10.1109/IMCEC51613.2021.9482349
Chen Xiaomao, Liu Chunfei, Fan Yiwei, Guo Ning
In order to solve the demand of time synchronization with GPS satellite clock, a combination of high-precision time interval measurement technology and crystal taming technology is used to realize the taming control of local clock source by using standard 1PPS signal to complete the time synchronization with GPS satellite clock. The interpolation of the delay unit is completed by the internal feed structure of FPGA to measure the time interval smaller than the system clock, which is combined with the pulse counting method to increase the range of the delay unit interpolation measurement. Finally, the FPGA is used to control the DAC7512 output voltage in real time to adjust the output of the local crystal based on the time interval output value. After a long time test, the accuracy of the synchronous 1PPS obtained by this method is better than 700ps compared with the standard 1PPS, and the local crystal can maintain a stable state for a long time.
{"title":"Time synchronization method based on time interval measurement","authors":"Chen Xiaomao, Liu Chunfei, Fan Yiwei, Guo Ning","doi":"10.1109/IMCEC51613.2021.9482349","DOIUrl":"https://doi.org/10.1109/IMCEC51613.2021.9482349","url":null,"abstract":"In order to solve the demand of time synchronization with GPS satellite clock, a combination of high-precision time interval measurement technology and crystal taming technology is used to realize the taming control of local clock source by using standard 1PPS signal to complete the time synchronization with GPS satellite clock. The interpolation of the delay unit is completed by the internal feed structure of FPGA to measure the time interval smaller than the system clock, which is combined with the pulse counting method to increase the range of the delay unit interpolation measurement. Finally, the FPGA is used to control the DAC7512 output voltage in real time to adjust the output of the local crystal based on the time interval output value. After a long time test, the accuracy of the synchronous 1PPS obtained by this method is better than 700ps compared with the standard 1PPS, and the local crystal can maintain a stable state for a long time.","PeriodicalId":240400,"journal":{"name":"2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117134130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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