Proposed region extraction is an important step in target recognition and has important influence on subsequent results. While fine-grained images are more difficult to extract proposed regions due to the intra-class diversity and inter-class similarity. In order to solve the problem of fine-grained target proposed area extraction, This paper proposes a novel coarse-to-fine Weighted channel network(WCN)-based fine-grained image suggestion region extraction method, which firstly initializes parameters on the coarse-grained big data set, then the fine-grained data set is fine-tuned for specific problems to reduce model dependence on large-scale coarse-grained images, and finally the invalid features are suppressed while improving the effective features according to the response graph of the extracted features and the correlation of the feature channels to get the proposed region. The model was validated in the publicly available fine-grained image library CUB200_2011 and Stanford Dog, and achieved an accuracy of 80.1% and 82.8%, respectively, which just proves the validity and accuracy of the model.
{"title":"Research on Fine-grained Proposed Region Extraction Method Based on Weighted Channel Network","authors":"Wenqian Wang, Jun Zhang, Fenglei Wang","doi":"10.1145/3291842.3291853","DOIUrl":"https://doi.org/10.1145/3291842.3291853","url":null,"abstract":"Proposed region extraction is an important step in target recognition and has important influence on subsequent results. While fine-grained images are more difficult to extract proposed regions due to the intra-class diversity and inter-class similarity. In order to solve the problem of fine-grained target proposed area extraction, This paper proposes a novel coarse-to-fine Weighted channel network(WCN)-based fine-grained image suggestion region extraction method, which firstly initializes parameters on the coarse-grained big data set, then the fine-grained data set is fine-tuned for specific problems to reduce model dependence on large-scale coarse-grained images, and finally the invalid features are suppressed while improving the effective features according to the response graph of the extracted features and the correlation of the feature channels to get the proposed region. The model was validated in the publicly available fine-grained image library CUB200_2011 and Stanford Dog, and achieved an accuracy of 80.1% and 82.8%, respectively, which just proves the validity and accuracy of the model.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134459583","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}
Electrically tunable bandpass filters are crucial components in wireless communication system. In this paper, a combline filter structure is used to design an electrically tunable filter, whose working frequency range is 200MHz ~ 600MHz. In the entire tuning range, 1dB relative bandwidth is about 12%, the insertion loss is less than 3dB, the input 2rd-order intercept point(IIP2) is more than 60dBm, the input 3th-order intercept point(IIP3) is more than 20dBm, and the input and output voltage standing wave ratio(VSWR) is less than 1.8. The test and simulation results are in good agreement. Finally, we apply this tunable filter to a 20MHz~1350MHz tuned filter bank and achieve good results.
{"title":"Design of Ultra Wide Octave Electrically Tunable Bandpass Filter for Wireless Communication","authors":"Moli Liu, Yiqun Lin, Sheng-jun Lu","doi":"10.1145/3291842.3291858","DOIUrl":"https://doi.org/10.1145/3291842.3291858","url":null,"abstract":"Electrically tunable bandpass filters are crucial components in wireless communication system. In this paper, a combline filter structure is used to design an electrically tunable filter, whose working frequency range is 200MHz ~ 600MHz. In the entire tuning range, 1dB relative bandwidth is about 12%, the insertion loss is less than 3dB, the input 2rd-order intercept point(IIP2) is more than 60dBm, the input 3th-order intercept point(IIP3) is more than 20dBm, and the input and output voltage standing wave ratio(VSWR) is less than 1.8. The test and simulation results are in good agreement. Finally, we apply this tunable filter to a 20MHz~1350MHz tuned filter bank and achieve good results.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128009567","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}
This paper proposes a novel frequency reconfigurable antenna based on the liquid crystal material because of the dielectric anisotropy. The antenna applies double layer structure so that liquid crystal can be easily injected on the second substrate. Experimental results show that when changing the effective dielectric constant of the liquid crystal, the center resonant frequency of antenna can be tuned continuously from 6.02 GHz to 5.91 GHz meaning that this antenna achieves a frequency tunability about 1.9%. Besides, in the whole adjustment process, the antenna's matching characteristics remains good. Thus, this kind of antennas are very feasible to be applied in the reconfigurable communication system. Furthermore, antenna designed in this article separates RF circuit from DC feed circuit by using a simple way, which makes the design efficient and more convenient.
{"title":"A Novel Frequency Reconfigurable Microstrip Antenna Based on Liquid Crystal","authors":"Chunyang Pan, Ziyuan He, Yaling Liu","doi":"10.1145/3291842.3291851","DOIUrl":"https://doi.org/10.1145/3291842.3291851","url":null,"abstract":"This paper proposes a novel frequency reconfigurable antenna based on the liquid crystal material because of the dielectric anisotropy. The antenna applies double layer structure so that liquid crystal can be easily injected on the second substrate. Experimental results show that when changing the effective dielectric constant of the liquid crystal, the center resonant frequency of antenna can be tuned continuously from 6.02 GHz to 5.91 GHz meaning that this antenna achieves a frequency tunability about 1.9%. Besides, in the whole adjustment process, the antenna's matching characteristics remains good. Thus, this kind of antennas are very feasible to be applied in the reconfigurable communication system. Furthermore, antenna designed in this article separates RF circuit from DC feed circuit by using a simple way, which makes the design efficient and more convenient.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114469266","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}
The optical performance monitoring system based on coherent optical sampling is wavelength and polarization sensitive. In this paper, we proposed an adaptive scheme including wavelength matching and polarization tracking by which the system can automatically adjust polarization and wavelength respectively. The experimental results demonstrated that the wavelength matching scheme can reduce the regulating times by four-fifths compared with the conventional method and the polarization adjustment scheme can significantly reduce the error caused by hysteresis effect of micro-regulator.
{"title":"A Polarization and Wavelength Adaptive Optical Performance Monitoring System","authors":"Zhao Zhao, Aiying Yang, Peng Guo","doi":"10.1145/3291842.3291899","DOIUrl":"https://doi.org/10.1145/3291842.3291899","url":null,"abstract":"The optical performance monitoring system based on coherent optical sampling is wavelength and polarization sensitive. In this paper, we proposed an adaptive scheme including wavelength matching and polarization tracking by which the system can automatically adjust polarization and wavelength respectively. The experimental results demonstrated that the wavelength matching scheme can reduce the regulating times by four-fifths compared with the conventional method and the polarization adjustment scheme can significantly reduce the error caused by hysteresis effect of micro-regulator.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126603098","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}
In the field of smart home, power line communication has been used widely with the advantage of its long-distance and low-cost. In this paper, we propose an intelligent home system design based on power line communication.This system is built with PLC module, singlechip, intelligent electric meter and relay module. And A PC client and server program is designed to implement remote meter reading and appliance control using power line carrier communication.
{"title":"Intelligent Home System Design Based on Power Line Communication","authors":"C. Yang, Zhenrong Zhang","doi":"10.1145/3291842.3291852","DOIUrl":"https://doi.org/10.1145/3291842.3291852","url":null,"abstract":"In the field of smart home, power line communication has been used widely with the advantage of its long-distance and low-cost. In this paper, we propose an intelligent home system design based on power line communication.This system is built with PLC module, singlechip, intelligent electric meter and relay module. And A PC client and server program is designed to implement remote meter reading and appliance control using power line carrier communication.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129564148","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}
Toshihiko Kato, Xiaofan Yan, R. Yamamoto, S. Ohzahata
Recently, according to the diversification of network environments, various TCP congestion control mechanisms have been introduced. Since the TCP congestion control algorithms affect the traffic characteristic in the Internet, it is important to analyze which algorithms are used widely. This paper proposes a method to identify a congestion control algorithm from passively collected packet traces that include only unidirectional packet traces. In unidirectional traces, it is hard to map a data segment and the ACK segment corresponding to it and to estimate round-trip time. So, the proposed method uses the curve fitting for sequence number vs. time graphs by applying the least squares method with linear through quartic functions, and maps the first-order and second-order differentiations. This paper applies the proposed method to various TCP congestion control algorithms including TCP Reno, CUBIC TCP, Hamilton TCP, TCP Vegas, and TCP Veno.
{"title":"Identification of TCP Congestion Control Algorithms from Unidirectional Packet Traces","authors":"Toshihiko Kato, Xiaofan Yan, R. Yamamoto, S. Ohzahata","doi":"10.1145/3291842.3291922","DOIUrl":"https://doi.org/10.1145/3291842.3291922","url":null,"abstract":"Recently, according to the diversification of network environments, various TCP congestion control mechanisms have been introduced. Since the TCP congestion control algorithms affect the traffic characteristic in the Internet, it is important to analyze which algorithms are used widely. This paper proposes a method to identify a congestion control algorithm from passively collected packet traces that include only unidirectional packet traces. In unidirectional traces, it is hard to map a data segment and the ACK segment corresponding to it and to estimate round-trip time. So, the proposed method uses the curve fitting for sequence number vs. time graphs by applying the least squares method with linear through quartic functions, and maps the first-order and second-order differentiations. This paper applies the proposed method to various TCP congestion control algorithms including TCP Reno, CUBIC TCP, Hamilton TCP, TCP Vegas, and TCP Veno.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130276652","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}
In order to mitigate inter-cell interference (ICI) in cellular networks, now the academic community have been discussed an algorithm to eliminate inter-cell interference namely interference alignment (IA). Interference alignment is an interference cancellation technique that achieves good system capacity at high signal-to-noise ratios. However, in order to achieve interference alignment, the transmitter and receiver must be jointly designed, which is often difficult to achieve. In addition, a large number of iterative transceiver design methods have been proposed and studied on the basis of different standards optimizing. This paper mainly studies the Minimum Weighted Leakage Interference (MIN-WLI). Here, we propose a symbol detection technique that assists in the alignment of minimum leakage interference[1-3]. It is a symbol detection algorithm based on the joint design of iterative transceivers with minimum leakage interference. The system simulation shows that the interference alignment method has better system performance than the traditional minimum leakage interference method.
{"title":"Research on MIN-WLI Interference Alignment Algorithm Based on Symbol Detection Assistance","authors":"G. Jia, Jian Liu, Libingyi Huang","doi":"10.1145/3291842.3291863","DOIUrl":"https://doi.org/10.1145/3291842.3291863","url":null,"abstract":"In order to mitigate inter-cell interference (ICI) in cellular networks, now the academic community have been discussed an algorithm to eliminate inter-cell interference namely interference alignment (IA). Interference alignment is an interference cancellation technique that achieves good system capacity at high signal-to-noise ratios. However, in order to achieve interference alignment, the transmitter and receiver must be jointly designed, which is often difficult to achieve. In addition, a large number of iterative transceiver design methods have been proposed and studied on the basis of different standards optimizing. This paper mainly studies the Minimum Weighted Leakage Interference (MIN-WLI). Here, we propose a symbol detection technique that assists in the alignment of minimum leakage interference[1-3]. It is a symbol detection algorithm based on the joint design of iterative transceivers with minimum leakage interference. The system simulation shows that the interference alignment method has better system performance than the traditional minimum leakage interference method.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114705515","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}
Using the structure of nested arrays, a broadband direction of arrival (DOA) estimation algorithm is presented. The algorithm combines different sensors data to construct a covariance matrix, which is equivalent to that of the uniform linear array whose aperture is same as the nested arrays, and then the DOAs of broadband sources can be estimated by the incoherent MUSIC algorithm. Compared to the traditional coherent subspace algorithms, the proposed algorithm does not need to pre-estimate the azimuths of sources. When the number of sources is greater than the number of sensors, it can still perform well. Under the condition of same array aperture, the number of the sensors is reduced considerably by using nested arrays, and the good localizing performance and spatial resolution can be obtained. Finally, computer simulations show the performance of the proposed algorithm.
{"title":"Broadband DOA Estimation Based on Nested Arrays","authors":"Wang Dan, Li Yan, Xiong Shujie","doi":"10.1145/3291842.3291920","DOIUrl":"https://doi.org/10.1145/3291842.3291920","url":null,"abstract":"Using the structure of nested arrays, a broadband direction of arrival (DOA) estimation algorithm is presented. The algorithm combines different sensors data to construct a covariance matrix, which is equivalent to that of the uniform linear array whose aperture is same as the nested arrays, and then the DOAs of broadband sources can be estimated by the incoherent MUSIC algorithm. Compared to the traditional coherent subspace algorithms, the proposed algorithm does not need to pre-estimate the azimuths of sources. When the number of sources is greater than the number of sensors, it can still perform well. Under the condition of same array aperture, the number of the sensors is reduced considerably by using nested arrays, and the good localizing performance and spatial resolution can be obtained. Finally, computer simulations show the performance of the proposed algorithm.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"875 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133764801","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}
Emergence of high-speed Internet and ubiquitous environment has led to a rapid increase of applications and malicious behaviors with various functions. Many of the complex and diverse protocols that occur under these situations, are unknown protocols that are at least documented. For efficient network management and network security, protocol reverse engineering that extract the specification of the protocols is very important. While various protocol reverse engineering methods are being studied, each of methods has some limitations. In this paper, we propose the reverse engineering method for extracting well-trimmed protocol specification. The proposed method can extract intuitive field formats, message formats with semantics, flow formats, and protocol state machine of the unknown protocol. We implement our approach in a prototype system and demonstrate the validity of our approach through experimenting it over HTTP protocol.
{"title":"Automatic Reverse Engineering Method for Extracting Well-trimmed Protocol Specification","authors":"Young-Hoon Goo, Kyu-Seok Shim, Myung-Sup Kim","doi":"10.1145/3291842.3291921","DOIUrl":"https://doi.org/10.1145/3291842.3291921","url":null,"abstract":"Emergence of high-speed Internet and ubiquitous environment has led to a rapid increase of applications and malicious behaviors with various functions. Many of the complex and diverse protocols that occur under these situations, are unknown protocols that are at least documented. For efficient network management and network security, protocol reverse engineering that extract the specification of the protocols is very important. While various protocol reverse engineering methods are being studied, each of methods has some limitations. In this paper, we propose the reverse engineering method for extracting well-trimmed protocol specification. The proposed method can extract intuitive field formats, message formats with semantics, flow formats, and protocol state machine of the unknown protocol. We implement our approach in a prototype system and demonstrate the validity of our approach through experimenting it over HTTP protocol.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"149 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133389224","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}
We propose an intra-channel nonlinearity (NL) estimation method for the first time in a 28Gbaud polarization-multiplexed 16 Quadrature Amplitude Modulation (PM-16QAM) system, by correcting high order statistical moments based (HOSMB) optical signal-to-noise ratio (OSNR) estimation method with correlation functions and a calibration factor. Besides, the calibration factor is explored the relationships with transmission distances and channel launched powers. This proposed estimation method is demonstrated to be more accurate than existing estimation methods and functions well in highly nonlinear systems. It has kept estimation errors under 0.8dB with actual OSNR ranging 18-28dB, channel launched power ranging from -4dBm to 4dBm and transmission distances ranging 400-2000km.
{"title":"Intra-Channel Nonlinearity Estimation Based on Statistical Moments Method and Correlation Function","authors":"Zihan Wang, Yaojun Qiao","doi":"10.1145/3291842.3291881","DOIUrl":"https://doi.org/10.1145/3291842.3291881","url":null,"abstract":"We propose an intra-channel nonlinearity (NL) estimation method for the first time in a 28Gbaud polarization-multiplexed 16 Quadrature Amplitude Modulation (PM-16QAM) system, by correcting high order statistical moments based (HOSMB) optical signal-to-noise ratio (OSNR) estimation method with correlation functions and a calibration factor. Besides, the calibration factor is explored the relationships with transmission distances and channel launched powers. This proposed estimation method is demonstrated to be more accurate than existing estimation methods and functions well in highly nonlinear systems. It has kept estimation errors under 0.8dB with actual OSNR ranging 18-28dB, channel launched power ranging from -4dBm to 4dBm and transmission distances ranging 400-2000km.","PeriodicalId":283197,"journal":{"name":"Proceedings of the 2nd International Conference on Telecommunications and Communication Engineering","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122402712","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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