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2012 5th International Conference on Computers and Devices for Communication (CODEC)最新文献

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Generalized mechanism of SOTDMA and probability of reception for satellite-based AIS 星载AIS SOTDMA广义机制与接收概率
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509332
Anindya Harchowdhury, B. K. Sarkar, K. Bandyopadhyay, A. Bhattacharya
{"title":"Generalized mechanism of SOTDMA and probability of reception for satellite-based AIS","authors":"Anindya Harchowdhury, B. K. Sarkar, K. Bandyopadhyay, A. Bhattacharya","doi":"10.1109/CODEC.2012.6509332","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509332","url":null,"abstract":"Satellite based ‘Automatic Identification System’ (AIS) for global maritime applications is of current interest. The challenge of the system mainly lies in the detection capability of the receiver due to multiple transmissions from different ships received at the satellite simultaneously. To estimate the performance of the receiver proper modeling of the channel access scheme is important. In this paper we propose a generalized methodology of the Self Organized Time Division Multiple Access (SOTDMA) in an extended observation area for satellite based AIS. The performance of the proposed scheme is compared with an existing model and more realistic reception performance by a satellite based receiver is shown.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124843923","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}
引用次数: 9
Effect of temperature and kink energy in multilevel digital circuit using Quantum dot cellular automata 温度和扭结能量对量子点元胞自动机多电平数字电路的影响
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509297
R. Chakraborty, D. De, Angshuman Khan, Chiradeep Mukherjee, S. Pramanik
{"title":"Effect of temperature and kink energy in multilevel digital circuit using Quantum dot cellular automata","authors":"R. Chakraborty, D. De, Angshuman Khan, Chiradeep Mukherjee, S. Pramanik","doi":"10.1109/CODEC.2012.6509297","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509297","url":null,"abstract":"Quantum-dot Cellular Automata (QCA) is a paradigm for low power, high speed computation technique in the field of nanoscience. Till today three types of QCA structures are discussed among them magnetic and molecular QCA operates at room temperature but the metallic dot QCA structure operates at a very low temperature at around absolute zero degree Kelvin. In this paper we comprehended that if the spacing between two consecutive cells in a metallic dot QCA is reduced lower than 2nm then the operating temperature can be enhanced up to 12 degree Kelvin. Instead of using only one majority gate we have used multi-input level shifter circuit where four majority gates are used and the output depend on all the inputs and the majority gates operation. According to QCADesigner tool, 2nm spacing between two consecutive cell is taken as standard for any circuit. Multi input level shifter circuit based on Quantum-dot Cellular Automata (QCA) is working at increased temperature with decreasing cell space.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122555809","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}
引用次数: 9
Effects of width of the quantum well on the shift in transition energy with operating current in InxGa1−xN/GaN quantum well diodes 量子阱宽度对InxGa1−xN/GaN量子阱二极管跃迁能随工作电流变化的影响
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509296
S. Panda, P. Bera, D. Biswas
{"title":"Effects of width of the quantum well on the shift in transition energy with operating current in InxGa1−xN/GaN quantum well diodes","authors":"S. Panda, P. Bera, D. Biswas","doi":"10.1109/CODEC.2012.6509296","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509296","url":null,"abstract":"The influence of the well width and the operating current on the transition energies of InxGa1-xN/GaN quantum well (QW) diodes have been studied through the self consistent solution of the Schrödinger and Poisson equations. Large blue shift of the emission energy is observed due to the reduction in the well width. With increase in the current density the emission peak shifts toward higher energy. This shift, which is a major disadvantage of the lighting devices, is minimized by decreasing the width of the QW.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114256106","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}
引用次数: 0
Two new quasi-orthogonal space-time block codes with 3-time slots for LTE-Advanced LTE-Advanced两种新的3时隙准正交空时分组码
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509232
N. Thakur, R. Bhatia, S. S. Thakur
{"title":"Two new quasi-orthogonal space-time block codes with 3-time slots for LTE-Advanced","authors":"N. Thakur, R. Bhatia, S. S. Thakur","doi":"10.1109/CODEC.2012.6509232","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509232","url":null,"abstract":"In this paper, we propose two new quasi-orthogonal space-time block codes (QOSTBCs) with three time slots for two transmit antennas. We also derive corresponding decoders for each of the proposed codes. While one decoder fecilitates joint detection, other one allows symbol-wise detection with additional pre-processing. One code provides better bit error rate (BER) performance than one of the existing QOSTBCs with three time slots and two transmit antennas. The other code requires lesser power and performs neary same as one of the existing QOSTBCs with three time-slots and two transmit antennas.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114600953","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}
引用次数: 2
Universal filter using operational transresistance amplifier 通用滤波器采用运算跨阻放大器
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509217
M. Ghosh, S. K. Paul, R. K. Ranjam
{"title":"Universal filter using operational transresistance amplifier","authors":"M. Ghosh, S. K. Paul, R. K. Ranjam","doi":"10.1109/CODEC.2012.6509217","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509217","url":null,"abstract":"In this paper proposes a multi input single output (MISO) third order voltage mode (VM) universal filter using only one operational transresistance amplifier (OTRA) is presented. The proposed circuit realizes lowpass, highpass, allpass, bandpass and notch responses from the same topology. The PSPICE simulation results using 0.5μm CMOS technology agree well with the theoretical design.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122137491","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}
引用次数: 2
Neural network based TEC model using multistation GPS-TEC around the northern crest of equatorial ionization anomaly 基于神经网络的赤道电离异常北波峰周围多站GPS-TEC模型
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509336
D. Sur, A. Das, A. Paul
{"title":"Neural network based TEC model using multistation GPS-TEC around the northern crest of equatorial ionization anomaly","authors":"D. Sur, A. Das, A. Paul","doi":"10.1109/CODEC.2012.6509336","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509336","url":null,"abstract":"The highest Total Electron Content (TEC) values in the world normally occur at Equatorial Anomaly region resulting in largest ionospheric range delay values observed for any potential SBAS system. The location and magnitude of the very high TEC values are directly related to the strength of the Equatorial Electrojet (EEJ) on day to day basis. The day to day variability of the location of the anomaly peak and its intensity is very large. This imposes severe limitations on the applicability of commonly used ionospheric models to the low latitude regions. A model is developed based on real time low latitude GPS-TEC data measured around the northern crest of the Equatorial Ionization Anomaly (EIA) during 2007 through 2011. This model is compared with standard ionospheric models like International Reference Ionosphere (IRI) and Parameterized Ionospheric Model (PIM) to establish its utility and applicability in the equatorial region for accurate predictions.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116841043","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}
引用次数: 0
All-optical conversion scheme from n to 2n line decoder using micro-ring resonators 全光转换方案从n到2n线解码器使用微环谐振器
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509326
J. N. Roy, J. K. Rakshit, T. Chattopadhyay
{"title":"All-optical conversion scheme from n to 2n line decoder using micro-ring resonators","authors":"J. N. Roy, J. K. Rakshit, T. Chattopadhyay","doi":"10.1109/CODEC.2012.6509326","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509326","url":null,"abstract":"In this paper, we have proposed and discussed an all-optical conversion scheme from its binary to its other 2n radix based form with the help of micro-ring resonator based tree-net architecture. Simulation results confirming described method is also reported. The micro-ring resonators are modulated through optical pump beam. Micro-ring resonator based all optical decoder model can be used as a basic building block of different potential applications in optical logic based secure code applications.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128468682","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}
引用次数: 0
Novel design of ultra wideband vertical slotted triangular (VST) sheet antenna 超宽带垂直开槽三角形(VST)天线的新设计
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509196
A. Modi, A. Gehani
{"title":"Novel design of ultra wideband vertical slotted triangular (VST) sheet antenna","authors":"A. Modi, A. Gehani","doi":"10.1109/CODEC.2012.6509196","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509196","url":null,"abstract":"In this paper, a new design of Ultra Wide Band (UWB) antenna is proposed. The antenna parameters in frequency domain analysis have been investigated to show its capability as an effective radiating element. The voltage standing wave ratio is less than 2 (VSWR<; 2) and return loss (S11) is less than -10 dB along the operation bandwidth of 4 GHz to 17 GHz. The simulated return loss, VSWR, input impedance and radiation pattern are presented in this paper. The antenna is very useful for impulse and UWB communication systems (in radar communication, for military application (defense department), bio-medical technology, space communication through satellite) and as proposed antenna has end fire radiation pattern it is very useful in point to point communication with very high gain performance.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123855316","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}
引用次数: 6
A Ka-band double balanced upconverter MMIC for space application 用于空间应用的ka波段双平衡上变频MMIC
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509292
A. Jain, R. S. Sharma, P. Sinha, A. Bhattacharya
{"title":"A Ka-band double balanced upconverter MMIC for space application","authors":"A. Jain, R. S. Sharma, P. Sinha, A. Bhattacharya","doi":"10.1109/CODEC.2012.6509292","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509292","url":null,"abstract":"This paper describes a novel compact double balanced upconverter MMIC architecture, which exhibits high conversion gain, good isolation and low spurious responses. The MMIC is realized using a space qualified 0.13μm MHEMT foundry process and is used for the development of Ku to Ka-band upconverter subsystem for on-board applications. It demonstrates a conversion gain of better than 15dB for IF frequency ranges of 12.75-13.25GHz with 8dBm LO drives at 5.35 & 6.95GHz. Six sub-circuits named IF amplifier, IF balun, Quad cold MHEMT mixing cell, LO balun, RF balun & RF amplifier are integrated on a single chip size of 3.7mm × 3mm to get a complete double balanced upconverter. This is the first demonstration of a monolithic MHEMT double balanced upconverter including on-chip IF & RF amplifiers in this frequency range.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123189290","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}
引用次数: 1
Sierpinski fractal binomial tapered planar monopole antenna for UWB communication 用于超宽带通信的Sierpinski分形二项锥形平面单极天线
2012 5th International Conference on Computers and Devices for Communication (CODEC) Pub Date : 2012-12-01 DOI: 10.1109/CODEC.2012.6509203
A. Gorai, S. Verma, A. Karmakar, R. Ghatak
{"title":"Sierpinski fractal binomial tapered planar monopole antenna for UWB communication","authors":"A. Gorai, S. Verma, A. Karmakar, R. Ghatak","doi":"10.1109/CODEC.2012.6509203","DOIUrl":"https://doi.org/10.1109/CODEC.2012.6509203","url":null,"abstract":"A miniaturized planar ultra wideband (UWB) monopole antenna with second iteration Sierpinski fractal is presented in this paper. The impedance bandwidth of the proposed antenna covers frequency range from 3.1 GHz to 10.6 GHz. The proposed antenna has circular split ring slot to truncate the band above 10.6 GHz. The measured antenna gain varies from -0.3 dBi to 5 dBi within the passband. The group delay profile is almost linear within the passband which ensures that antenna is not dispersive.","PeriodicalId":399616,"journal":{"name":"2012 5th International Conference on Computers and Devices for Communication (CODEC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116252396","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}
引用次数: 3
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