Pub Date : 2015-06-18DOI: 10.1109/ECS.2015.7124940
R. Ravanya, S. Ramya
A biometric system makes a pattern recognition decision in accordance with the biometric features extracted from a human being. This paper presents a text-independent speaker Verification system using support vector machines (SVMs) is to identify the speaker by listening to the voice of the speaker. Thus speaker verification is to determine whether a test utterance is spoken by a target speaker and also causes large power dissipation. In this paper, Spurious Power Suppression Technique (SPST) is utilized to overcome these issues, which uses a detection logic circuit to detect the effective data range of arithmetic units, e.g., adders or multipliers. This SPST is used to reduce the power dissipation when compared to previous method.
{"title":"Low power SVM module using spurious power suppression technique","authors":"R. Ravanya, S. Ramya","doi":"10.1109/ECS.2015.7124940","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124940","url":null,"abstract":"A biometric system makes a pattern recognition decision in accordance with the biometric features extracted from a human being. This paper presents a text-independent speaker Verification system using support vector machines (SVMs) is to identify the speaker by listening to the voice of the speaker. Thus speaker verification is to determine whether a test utterance is spoken by a target speaker and also causes large power dissipation. In this paper, Spurious Power Suppression Technique (SPST) is utilized to overcome these issues, which uses a detection logic circuit to detect the effective data range of arithmetic units, e.g., adders or multipliers. This SPST is used to reduce the power dissipation when compared to previous method.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116417242","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124838
J. Catherine, R. Murugan
This paper deals with a simulation analysis of Power Factor Correction (PFC) in BLDC motor drives using type III cuk derived converter. A power factor corrected converter is required for improving power quality at the AC mains of an inverter fed BLDC motor drive. Conventionally, the BLDC motor is fed by a diode bridge rectifier (DBR) which results in highly distorted supply current and a poor power factor. A new bridgeless single-phase ac-dc Cuk derived topology has been introduced for power factor correction. This bridgeless topology uses minimum number of switches and thus reduces the less conduction losses compared with the conventional PFC rectifier. There are three Cuk derived configurations for power factor correction. In this paper, all the Cuk derived topologies are investigated and compared. The best topology is modelled in MATLAB/Simulink platform and the results are analysed.
{"title":"Simulation analysis of power quality improvement in BLDC motor drive using type III CUK derived converter","authors":"J. Catherine, R. Murugan","doi":"10.1109/ECS.2015.7124838","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124838","url":null,"abstract":"This paper deals with a simulation analysis of Power Factor Correction (PFC) in BLDC motor drives using type III cuk derived converter. A power factor corrected converter is required for improving power quality at the AC mains of an inverter fed BLDC motor drive. Conventionally, the BLDC motor is fed by a diode bridge rectifier (DBR) which results in highly distorted supply current and a poor power factor. A new bridgeless single-phase ac-dc Cuk derived topology has been introduced for power factor correction. This bridgeless topology uses minimum number of switches and thus reduces the less conduction losses compared with the conventional PFC rectifier. There are three Cuk derived configurations for power factor correction. In this paper, all the Cuk derived topologies are investigated and compared. The best topology is modelled in MATLAB/Simulink platform and the results are analysed.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125696137","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124937
A. Sajith, S. Hariharan
Image processing and Pattern Recognition are very much important in the extraction of clinical information from images. A hybrid image processing method is presented based on spatial fuzzy C means clustering combined with parametric deformable model for CT liver images. The Spatial fuzzy c-means using pixel classification and parametric deformable models are utilizing dynamic variational boundaries for image segmentation. The controlling parameters of parametric deformable model evolution are also estimated from the results of clustering. Thus we can improve the segmentation of liver image thereby increasing the detection of tumour effectively. Also we can segment out the liver and the tumor with increased efficiency and robustness.
{"title":"Spatial fuzzy C-means clustering based segmentation on CT images","authors":"A. Sajith, S. Hariharan","doi":"10.1109/ECS.2015.7124937","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124937","url":null,"abstract":"Image processing and Pattern Recognition are very much important in the extraction of clinical information from images. A hybrid image processing method is presented based on spatial fuzzy C means clustering combined with parametric deformable model for CT liver images. The Spatial fuzzy c-means using pixel classification and parametric deformable models are utilizing dynamic variational boundaries for image segmentation. The controlling parameters of parametric deformable model evolution are also estimated from the results of clustering. Thus we can improve the segmentation of liver image thereby increasing the detection of tumour effectively. Also we can segment out the liver and the tumor with increased efficiency and robustness.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125113009","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124846
G. Ram, P. Chakravorty, D. Mandal, R. Kar, S. Ghoshal
In this paper, a new evolutionary optimization algorithm named gravitational search algorithm with wavelet mutation (GSAWM) is adopted for optimal design of hyper beam pattern of linear antenna arrays. Hyper beam is derived from sum and difference beam patterns associated with hyper beam exponent parameter for the array. In GSAWM, particles are considered as objects and their performances are measured by their masses. All these objects attract each other by gravity forces, and these forces produce global movements of all objects towards the objects with heavier masses. GSAWM guarantees the exploitation step of the algorithm and it is apparently free from premature convergence. Extensive simulation results justify superior optimization capability of GSAWM over the aforementioned optimization techniques. By optimization of current excitation weights and uniform inter-element spacing, GSAWM achieves optimized hyper beam with much greater reduction in side lobe level (SLL), improved directivity and much more improved first null beam width (FNBW), keeping the same value of hyper beam exponent. The whole simulation experiment has been performed for 10-, 14-, and 20-element linear antenna arrays.
{"title":"GSAWM for beamforming and directivity of linear antenna arrays","authors":"G. Ram, P. Chakravorty, D. Mandal, R. Kar, S. Ghoshal","doi":"10.1109/ECS.2015.7124846","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124846","url":null,"abstract":"In this paper, a new evolutionary optimization algorithm named gravitational search algorithm with wavelet mutation (GSAWM) is adopted for optimal design of hyper beam pattern of linear antenna arrays. Hyper beam is derived from sum and difference beam patterns associated with hyper beam exponent parameter for the array. In GSAWM, particles are considered as objects and their performances are measured by their masses. All these objects attract each other by gravity forces, and these forces produce global movements of all objects towards the objects with heavier masses. GSAWM guarantees the exploitation step of the algorithm and it is apparently free from premature convergence. Extensive simulation results justify superior optimization capability of GSAWM over the aforementioned optimization techniques. By optimization of current excitation weights and uniform inter-element spacing, GSAWM achieves optimized hyper beam with much greater reduction in side lobe level (SLL), improved directivity and much more improved first null beam width (FNBW), keeping the same value of hyper beam exponent. The whole simulation experiment has been performed for 10-, 14-, and 20-element linear antenna arrays.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125301631","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124738
K. David Solomon Raj, P. R. Kumar
This paper is concerned with design of an autopilot for longitudinal flight control of a conventional airplane. There are different modes of automatic longitudinal flight controls. Among those pitch attitude hold, altitude hold and vertical speed hold mode autopilots are implemented in which controller is designed for each of these modes. By the use of this controller, the system performance is improved. The performance requirements such as the peak overshoot to be less than 15% and the rise time to be less than 1 second has been achieved by the use of each controller in different modes. Traditional control techniques such as PID controller and Lead-Lag controllers are designed to each of these autopilot modes. Root-locus design technique is applied for tuning the parameters of each controller. Simulation of autopilots in the presence of three different types of atmospheric disturbances such as Dryden wind gust, Vertical wind gust model and turbulence are also observed. As in effect due to disturbance on each mode, a pitch rate feedback is applied in the inner loop of pitch controller. So a feedback control loop is developed to design the autopilot.
{"title":"Design and simulation of longitudinal autopilot modes for a conventional aircraft","authors":"K. David Solomon Raj, P. R. Kumar","doi":"10.1109/ECS.2015.7124738","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124738","url":null,"abstract":"This paper is concerned with design of an autopilot for longitudinal flight control of a conventional airplane. There are different modes of automatic longitudinal flight controls. Among those pitch attitude hold, altitude hold and vertical speed hold mode autopilots are implemented in which controller is designed for each of these modes. By the use of this controller, the system performance is improved. The performance requirements such as the peak overshoot to be less than 15% and the rise time to be less than 1 second has been achieved by the use of each controller in different modes. Traditional control techniques such as PID controller and Lead-Lag controllers are designed to each of these autopilot modes. Root-locus design technique is applied for tuning the parameters of each controller. Simulation of autopilots in the presence of three different types of atmospheric disturbances such as Dryden wind gust, Vertical wind gust model and turbulence are also observed. As in effect due to disturbance on each mode, a pitch rate feedback is applied in the inner loop of pitch controller. So a feedback control loop is developed to design the autopilot.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125496012","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124991
M. Geethananda, Z. C. Alex, K. Shambavi
A planar multi-ring monopole antenna for ultra wide band applications is presented in this paper. The proposed antenna is designed using concentric rings of width 1.3 mm which leads to improved band width, radiation efficiency and reduced size. The proposed antenna size is 30*30*1.6 mm3 which operates over a frequency range of 2.6 to 13.5 GHz. The radiation pattern is consistent in UWB range which is bidirectional in elevation plane and omnidirectional in azimuth plane. The radiation efficiency of the proposed antenna is 94.6%.
{"title":"Design of planar multi-ring monopole antenna for UWB applications","authors":"M. Geethananda, Z. C. Alex, K. Shambavi","doi":"10.1109/ECS.2015.7124991","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124991","url":null,"abstract":"A planar multi-ring monopole antenna for ultra wide band applications is presented in this paper. The proposed antenna is designed using concentric rings of width 1.3 mm which leads to improved band width, radiation efficiency and reduced size. The proposed antenna size is 30*30*1.6 mm3 which operates over a frequency range of 2.6 to 13.5 GHz. The radiation pattern is consistent in UWB range which is bidirectional in elevation plane and omnidirectional in azimuth plane. The radiation efficiency of the proposed antenna is 94.6%.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":" 36","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120827387","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124848
A. Manikandan, J. Ajayan, C. K. Arasan, S. Karthick, K. Vivek
The rapid growth in CMOS technology with the shrinking device size towards 22 nm has allowed for placement of billions of transistors on a single microprocessor chip. To achieve very high system performance, domino logic styles are widely employed in high performance VLSI chips together with aggressive technology scaling. Comparators are widely used in central processing units (CPUs) and microcontrollers (MCUs). In this paper, a 64 bit comparator circuit is proposed which has a lower leakage and higher noise immunity without dramatic speed degradation compared to high speed domino logic, leakage current replica keeper domino logic and diode footed domino logic. This circuit is based on comparison of mirrored current of the pull up network (PUN) with its worst case leakage current. Current comparison based domino technique reduces the parasitic capacitance on the dynamic node using a small keeper transistor, which reduces the contention current, power consumption and also the delay of the circuit. Simulation results of 64 bit comparator designed using a 22nm high performance predictive technology model demonstrate 51% power reduction compared to a standard domino circuits for 64 bit comparator.
{"title":"High speed low power 64-bit comparator designed using current comparison based domino logic","authors":"A. Manikandan, J. Ajayan, C. K. Arasan, S. Karthick, K. Vivek","doi":"10.1109/ECS.2015.7124848","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124848","url":null,"abstract":"The rapid growth in CMOS technology with the shrinking device size towards 22 nm has allowed for placement of billions of transistors on a single microprocessor chip. To achieve very high system performance, domino logic styles are widely employed in high performance VLSI chips together with aggressive technology scaling. Comparators are widely used in central processing units (CPUs) and microcontrollers (MCUs). In this paper, a 64 bit comparator circuit is proposed which has a lower leakage and higher noise immunity without dramatic speed degradation compared to high speed domino logic, leakage current replica keeper domino logic and diode footed domino logic. This circuit is based on comparison of mirrored current of the pull up network (PUN) with its worst case leakage current. Current comparison based domino technique reduces the parasitic capacitance on the dynamic node using a small keeper transistor, which reduces the contention current, power consumption and also the delay of the circuit. Simulation results of 64 bit comparator designed using a 22nm high performance predictive technology model demonstrate 51% power reduction compared to a standard domino circuits for 64 bit comparator.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132333044","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124731
D. Rosepriya, Kayalvizhi
In this paper compact design of planar slot antenna with band-notched function for UWB application is presented. This proposed antenna design explains the method to notch the interfering frequencies in the UWB by loading the small strips over the conventional microstrip patch antenna. To create notch for some narrow bands such as WLAN, WIMAX and X band in the UWB by using slits. This can be done by placing angle shaped slits on the substrate, two symmetrical slits placed on the tapered shaped Ground plane and two narrow slits are etched out on the patch of the antenna. By properly altering the size and location of the slits the proposed antenna design achieves the UWB operation and notch characteristics without altering overall size of the antenna is 22 × 24 × 1.6 mm3. This notch band will help to avoid the possible interference between UWB and these narrow bands. The simulated result gives a good impedance matching, return loss <; -10 dB and VSWR below 2 in the frequency range of 3.1-12GHz (≈9GHz).
{"title":"Compact design of slot antenna with band-notched function for UWB application","authors":"D. Rosepriya, Kayalvizhi","doi":"10.1109/ECS.2015.7124731","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124731","url":null,"abstract":"In this paper compact design of planar slot antenna with band-notched function for UWB application is presented. This proposed antenna design explains the method to notch the interfering frequencies in the UWB by loading the small strips over the conventional microstrip patch antenna. To create notch for some narrow bands such as WLAN, WIMAX and X band in the UWB by using slits. This can be done by placing angle shaped slits on the substrate, two symmetrical slits placed on the tapered shaped Ground plane and two narrow slits are etched out on the patch of the antenna. By properly altering the size and location of the slits the proposed antenna design achieves the UWB operation and notch characteristics without altering overall size of the antenna is 22 × 24 × 1.6 mm3. This notch band will help to avoid the possible interference between UWB and these narrow bands. The simulated result gives a good impedance matching, return loss <; -10 dB and VSWR below 2 in the frequency range of 3.1-12GHz (≈9GHz).","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133992403","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124759
S. Sakthivel, A. Ravi Sankar
Watermarking the digital data is a familiar technique to authenticate and resolve the copyright issues of multimedia data. This paper proposes a new VLSI architecture for watermarking grayscale images using weighted median prediction operation, as this mechanism will have a minimum computation complexity. In this VLSI based data hiding process the secret digital signature is hidden in the host image and analyzed with the PSNR value and Payload capacity.
{"title":"A VLSI architecture for watermarking of grayscale images using weighted median prediction","authors":"S. Sakthivel, A. Ravi Sankar","doi":"10.1109/ECS.2015.7124759","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124759","url":null,"abstract":"Watermarking the digital data is a familiar technique to authenticate and resolve the copyright issues of multimedia data. This paper proposes a new VLSI architecture for watermarking grayscale images using weighted median prediction operation, as this mechanism will have a minimum computation complexity. In this VLSI based data hiding process the secret digital signature is hidden in the host image and analyzed with the PSNR value and Payload capacity.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128351088","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 : 2015-06-18DOI: 10.1109/ECS.2015.7124958
I. Nikhil, S. Ramesh
This paper considers an orthogonal frequency time division multiplexing (OFDM) over high mobility fading channels. It propose ICI suppression algorithm by combining the IBI free part and its corresponding part in cyclic prefix. The algorithm is further validated by simulation and comparison with other ICI self-cancellation methods.
{"title":"ICI mitigation for pilot aided OFDM system over high mobility fading channels","authors":"I. Nikhil, S. Ramesh","doi":"10.1109/ECS.2015.7124958","DOIUrl":"https://doi.org/10.1109/ECS.2015.7124958","url":null,"abstract":"This paper considers an orthogonal frequency time division multiplexing (OFDM) over high mobility fading channels. It propose ICI suppression algorithm by combining the IBI free part and its corresponding part in cyclic prefix. The algorithm is further validated by simulation and comparison with other ICI self-cancellation methods.","PeriodicalId":202856,"journal":{"name":"2015 2nd International Conference on Electronics and Communication Systems (ICECS)","volume":"160 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123022213","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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