2012 International Conference on Devices, Circuits and Systems (ICDCS)最新文献

{"title":"Local clustering and threshold sensitive routing algorithm for Wireless Sensor Networks","authors":"R. Roseline, P. Sumathi","doi":"10.1109/ICDCSYST.2012.6188748","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188748","url":null,"abstract":"Wireless Sensor Networks (WSN) is an excellent technology that can sense, measure, and gather information from the real world and, based on some local decision process transmit the sensed data to the user. These networks allow the physical environment to be measured at high resolutions, and greatly increase the quality and quantity of real-world data and information for applications like environment monitoring. The energy constraint of WSN makes energy conservation the most important goal of routing algorithms. LEACH (Low Energy Adaptive Clustering Hierarchy) is a Proactive protocol and was proposed to organize a sensor network into a set of clusters so that energy consumption is evenly distributed among all sensor nodes. Despite the good performance of LEACH, it has the drawback that the TDMA scheduling assumes that nodes always have data to send. While another protocol TEEN(Threshold Sensitive Energy Efficient sensor Network) proposed for Reactive Networks sense the environment continuously, but transmit data only when a certain threshold is sensed. This protocol is suitable for time critical applications and also is energy efficient because transmission is done less frequently. But the disadvantage of TEEN is that if the thresholds are not reached, the nodes will never communicate, and the user will not get data from the network at all and will not come to know if all the nodes die. In this paper, a hybrid routing algorithm called LCTS(Local Clustering and Threshold Sensitive) is proposed, that takes the advantages of LEACH and TEEN and eliminates its drawbacks. LCTS makes use of symmetric propagation channels where Cluster Head (CH) advertisement heard with the largest signal strength is the cluster-head to whom minimum amount of transmitted energy is needed for communication. The Base Station (BS) selects the Cluster Heads based on location and then the clusters are formed by the Cluster Heads. The nodes communicate with the cluster head in TDMA and send their energy level even if the threshold is not reached and this ensures that the nodes are alive. The sensed data is compressed at the CH and sent to the Base Station.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120950967","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}

{"title":"VLSI design and implementation of reconfigurable OFDM transceivers for software defined radio","authors":"P. Krishna, S. Prabu, E. Logashanmugam","doi":"10.1109/ICDCSYST.2012.6188725","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188725","url":null,"abstract":"This paper presents a software-defined radio (SDR) system with reconfigurable architecture for wireless communications. The baseband software implementation by using a low-power fixed-point digital signal processor (DSP) is applied to demonstrate the concept of SDRs for different standards, and different operational modes. For simplicity, two operational modes, quadrature amplitude modulation (QAM) and quadrature phase shift keying (QPSK) of OFDM baseband transceivers are implemented. The interoperability and adaptability among these operational modes of this OFDM System is discussed. Both modes employ radix-2 decimation-in-time fast Fourier transform (FFT) algorithms. The architecture presented is implemented using a hardware description language (verilog HDL) code. The outcome of the implementation is a portable, scalable, quickly adaptable and reconfigurable system which supplies a high quality signal.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121001217","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}

{"title":"Delay and power optimized register blocks for the low power microcontrollers","authors":"A. Aditya, G. R. Chowdary, J. Meenakshi","doi":"10.1109/ICDCSYST.2012.6188793","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188793","url":null,"abstract":"The present day technologies require low power consideration for portable circuits having the microcontrollers. A particular useful feature of the microcontroller core is the inclusion of a Boolean processing engine which allows bit-level Boolean logic operations to be carried out directly and efficiently on internal registers and RAM. The registers designed are the fundamental hardware components necessary to create the 16-bit, index register and other special function systems. This paper derives the comparison of different technology besides the traditional CMOS, a better technique in constraints of speed and area is optimized, are considered for the implementation. Such register blocks helps in creating portable devices with longer battery life. This is implemented in CADENCE design tool in 180nm.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127456583","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}

{"title":"A two dimensional analytical modeling of fully depleted dual material gate SON MOSFET and evidence for suppressed SCEs","authors":"S. Naha, S. Sarkhel, S. Sarkar","doi":"10.1109/ICDCSYST.2012.6188768","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188768","url":null,"abstract":"In this paper, an analytical model of a fully depleted nanoscale dual- material gate (DMG) SON MOSFET has been developed and performance comparison is made with SMG SON MOSFET. A 2D Poisson's solution based generalized threshold voltage model has been developed. It is found that the introduction of the DMG structure in a fully depleted SON MOSFET leads to subdued SCEs due to a step-function in the channel potential profile thereby improving device performance and enhances devices scalability some steps further with the extreme exploitation of the idea, threshold control by means of multiple material gate electrode.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122070385","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}

{"title":"Simulation study of SOI four gate transistor","authors":"B. Debnath, M. S. Islam, S. L. Noor, M. Hassan, A. Haq, M. Z. R. Khan","doi":"10.1109/ICDCSYST.2012.6188709","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188709","url":null,"abstract":"The structure of silicon-on-insulator (SOI) four-gate transistor (G4-FET) and its different parameters for different biasing conditions are studied. A G4-FET simulation model was developed by Silvaco/Atlas 3-D simulator which incorporates non-ideal effects like concentration dependent mobility, Shockley-Read-Hall recombination, Auger recombination, bandgap narrowing effect. This model can be useful in measuring parameters dependency of a SOI four gate transistor.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123605996","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}

{"title":"Efficient spectrum sensing methods for Cognitive Radio networks","authors":"A. Rajeswari, T. G. Dhaarani","doi":"10.1109/ICDCSYST.2012.6188801","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188801","url":null,"abstract":"In this paper, a comparison between the performance of Cognitive Radio systems with Energy Detection in various channels such as AWGN and Rayleigh with various modulation schemes such as DPSK, QAM, and MSK are presented. A comparison between probability of detection in simulation and theory has been obtained.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114205569","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}

{"title":"Dual polarized circular microstrip space-fed antenna array design with high isolation and broad bandwidth","authors":"P. Mishra, G. Kumar","doi":"10.1109/ICDCSYST.2012.6188743","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188743","url":null,"abstract":"This paper presents a novel approach to design dual polarized antenna with high isolation and broad bandwidth using space-fed antenna arrays. The three layer stacked configuration is used for the antenna array design. Space-fed antenna array design removes the complexity and losses of the feed networks and achieves better efficiency. FR4 substrate of εr = 4.4, tan δ = 0.02 and h = 1.6 mm is used for low cost antenna design. The antenna is designed for 5.8 GHz frequency band. Antenna design is simulated using IE3D software and results are presented. Antenna isolation of better than 30 dB between two orthogonal ports and cross-polar level less than 40 dB has been achieved. The VSWR<;2 bandwidth is 13% and maximum antenna gain is 11.8 dBi. This antenna array can be extended to higher gain antenna design.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128045895","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}

{"title":"Compact packing of CdS nanoparticle in flower like TiO2 nanorods for DSSC solar cell","authors":"M. Misra, Madan Lal Singla, P. Kapur, C. Ghansyam","doi":"10.1109/ICDCSYST.2012.6188745","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188745","url":null,"abstract":"Crystalline TiO2 nanorod was grown into flower like structure on ITO surface by hydrothermal method. CdS nanoparticles prepare from the precursor cadmium acetate and sodium sulfide and particle size control by varying concentration of Thioglycolic acid (TGA). These nanoparticles are farther embedded on TiO2 nanorod surface by chemical bath deposition. The behavior of film will further used for DSSC solar cell. These film has been was characterized by X-ray diffraction (XRD), field emission scanning electron microscope(FE-SEM), absorption spectroscopy for morphology and optical behavior.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"22 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132625350","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}

{"title":"Ergodic channel capacity of WiMAX OFDM networks in the presence of adjacent channel interference with diversity combining","authors":"S. Subha, V. Bhaskar","doi":"10.1109/ICDCSYST.2012.6188648","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188648","url":null,"abstract":"WiMAX (Worldwide Interoperability for Microwave Access) is a promising technology which can offer high speed voice, video and data services upto the requirements at the customer's end. The objective of this paper is to evaluate the performance of a WiMAX system in the presence of Adjacent channel interference under No diversity case and Selection combining diversity employing different adaptive transmission policies. The WiMAX system incorporates OFDM with QPSK modulation as the transmission scheme. Simulated results of the estimated channel capacity show that the implementation of Optimal power and rate adaptation policy is highly effective to combat adjacent channel interference in the WiMAX communication system under Selection combining.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133083266","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}

{"title":"FPGA implementation of neural network for linearization of thermistor characteristics","authors":"D. Sonowal, M. Bhuyan","doi":"10.1109/ICDCSYST.2012.6188753","DOIUrl":"https://doi.org/10.1109/ICDCSYST.2012.6188753","url":null,"abstract":"This paper presents an FPGA (Field Programmable Gate Array) implementation of an artificial neural network (ANN) for linearization of nonlinear characteristics of a thermistor. A feed forward ANN is used for linearization. The network is trained in MATLAB with back propagation algorithm; weights and biases are determined and then implemented in Spartan-III FPGA. Subroutines are developed for single precision floating point arithmetic in IEEE-754 format.","PeriodicalId":356188,"journal":{"name":"2012 International Conference on Devices, Circuits and Systems (ICDCS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133300163","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}