Pub Date : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712810
G. Chandrasekhar, B. Abdul Rahim, F. Shaik, K. Soundra Rajan
Generally on CCD Bayer CFA images, compression is performed after demosaicing. Nowadays, for better image quality compression-first schemes are preferred over the conventional demosaicing-first schemes. In some high-end photography applications, original CFA images are required; in such cases lossless compression of CFA images is necessary. A fair performance is obtained for CFA images by lossless image compression methods like JPEG-LS, JPEG-2000, etc. The proposed method mainly aims at exploiting a context matching technique to rank the neighboring pixels when predicting a pixel in a CFA image. It reorders the neighboring samples such that closest neighboring samples of the same color are predicted on higher context similarity. Adaptive color difference estimation follows the adaptive codeword generation technique to adjust the divisor of rice code for encoding the prediction residues. From Simulation results, the proposed algorithm achieved a better compression performance as compared with conventional lossless CFA image coding methods. The experimental results are obtained to prove the proposed method is having best average compression ratio as compared with the latest lossless Bayer image compression algorithms using MATLAB, a technical computing language.
{"title":"Ricean code based compression method for Bayer CFA images","authors":"G. Chandrasekhar, B. Abdul Rahim, F. Shaik, K. Soundra Rajan","doi":"10.1109/RSTSCC.2010.5712810","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712810","url":null,"abstract":"Generally on CCD Bayer CFA images, compression is performed after demosaicing. Nowadays, for better image quality compression-first schemes are preferred over the conventional demosaicing-first schemes. In some high-end photography applications, original CFA images are required; in such cases lossless compression of CFA images is necessary. A fair performance is obtained for CFA images by lossless image compression methods like JPEG-LS, JPEG-2000, etc. The proposed method mainly aims at exploiting a context matching technique to rank the neighboring pixels when predicting a pixel in a CFA image. It reorders the neighboring samples such that closest neighboring samples of the same color are predicted on higher context similarity. Adaptive color difference estimation follows the adaptive codeword generation technique to adjust the divisor of rice code for encoding the prediction residues. From Simulation results, the proposed algorithm achieved a better compression performance as compared with conventional lossless CFA image coding methods. The experimental results are obtained to prove the proposed method is having best average compression ratio as compared with the latest lossless Bayer image compression algorithms using MATLAB, a technical computing language.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130683328","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712880
E. Annie Elisabeth Jebaseeli, D. Susitra
Climate change is a contemporary issue and the international communities have accepted the dangers of green house gas emissions. Renewable energy is one of the hot topics when it comes to dealing with green house gas emissions treatments. Wind generation is one of the renewable energy power sources that helps in reducing the carbon di oxide from our atmosphere and is one of the major remedy for green house gas emission treatments. Switched Reluctance Machine (SRM) when operated as Generator is proved to be most efficient with variable wind speeds. A knowledge on the performance characteristics of Switched Reluctance machine is essential for its optimum design. The performance analysis of SRM with different winding constructions based on SRdAS (switched reluctance design and simulation ) software package is presented in this paper for exploring its suitability in widespread applications. The model of SRM has been developed based on finite element method in the above simulation package.
{"title":"Performance analysis of various configurations of Switched Reluctance Machine for wind energy applications","authors":"E. Annie Elisabeth Jebaseeli, D. Susitra","doi":"10.1109/RSTSCC.2010.5712880","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712880","url":null,"abstract":"Climate change is a contemporary issue and the international communities have accepted the dangers of green house gas emissions. Renewable energy is one of the hot topics when it comes to dealing with green house gas emissions treatments. Wind generation is one of the renewable energy power sources that helps in reducing the carbon di oxide from our atmosphere and is one of the major remedy for green house gas emission treatments. Switched Reluctance Machine (SRM) when operated as Generator is proved to be most efficient with variable wind speeds. A knowledge on the performance characteristics of Switched Reluctance machine is essential for its optimum design. The performance analysis of SRM with different winding constructions based on SRdAS (switched reluctance design and simulation ) software package is presented in this paper for exploring its suitability in widespread applications. The model of SRM has been developed based on finite element method in the above simulation package.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130743064","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712851
M. Nirmala, S. Sundaram
The El Nino or Southern Oscillation is the outcome of the strong coupling and interactions between the Tropical Ocean and Atmosphere, which plays a major role in the development of global climatic system. In this study, a data set containing the Monthly Rainfall in Tamilnadu and a data set containing the Sea Surface Temperature of Nino 3.4 for 59 years (1950 – 2008) are used to model and analyse the impact of El Nino events in the Annual Rainfall of Tamilnadu through Intervention analysis. The experimental results show that the ARIMA - Intervention model is more precise in explaining and analysing the effect of Intervention events.
{"title":"El Nino based intervention analysis of Rainfall in Tamilnadu","authors":"M. Nirmala, S. Sundaram","doi":"10.1109/RSTSCC.2010.5712851","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712851","url":null,"abstract":"The El Nino or Southern Oscillation is the outcome of the strong coupling and interactions between the Tropical Ocean and Atmosphere, which plays a major role in the development of global climatic system. In this study, a data set containing the Monthly Rainfall in Tamilnadu and a data set containing the Sea Surface Temperature of Nino 3.4 for 59 years (1950 – 2008) are used to model and analyse the impact of El Nino events in the Annual Rainfall of Tamilnadu through Intervention analysis. The experimental results show that the ARIMA - Intervention model is more precise in explaining and analysing the effect of Intervention events.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134267378","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712881
M. Sasikumar, R. Madhusudhanan, S. Chenthurpandian
This paper describes the simulation model and the harmonics analysis of cascaded five level H-bridge inverters fed RL load and induction motor load system for stand alone applications. The SEIG fed H- bridge multi level inverter (MLI) for variable speed wind energy conversion systems are considered for various stand alone applications. In this paper, the SEIG fed cascaded five level inverters for induction motor load systems are clearly explained with the help of MATLAB / SIMULINK models. The generated voltage of the wind driven self - excited induction generator (SEIG) is mainly depending on the wind velocity fluctuations, appropriate capacitance values and load conditions. The five level cascaded inverters has interface with the wind driven self - excited induction generator (SEIG). The variable magnitude, variable frequency voltage of the generator can be controlled by choosing the proper modulation index. The simulation and harmonic analysis of the proposed inverter will be discussed and the total harmonic distortion will be evaluated.
{"title":"Modeling and analysis of cascaded H-bridge inverter for wind driven isolated squirrel cage induction generators","authors":"M. Sasikumar, R. Madhusudhanan, S. Chenthurpandian","doi":"10.1109/RSTSCC.2010.5712881","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712881","url":null,"abstract":"This paper describes the simulation model and the harmonics analysis of cascaded five level H-bridge inverters fed RL load and induction motor load system for stand alone applications. The SEIG fed H- bridge multi level inverter (MLI) for variable speed wind energy conversion systems are considered for various stand alone applications. In this paper, the SEIG fed cascaded five level inverters for induction motor load systems are clearly explained with the help of MATLAB / SIMULINK models. The generated voltage of the wind driven self - excited induction generator (SEIG) is mainly depending on the wind velocity fluctuations, appropriate capacitance values and load conditions. The five level cascaded inverters has interface with the wind driven self - excited induction generator (SEIG). The variable magnitude, variable frequency voltage of the generator can be controlled by choosing the proper modulation index. The simulation and harmonic analysis of the proposed inverter will be discussed and the total harmonic distortion will be evaluated.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132846458","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712821
B. Sheela Rani, C. Gomathy, B. Sowmya, R. Narmadha
A high-precision attitude determination and control of the sathyabama satellite is an essential task for the success of the whole mission. Satellite Attitude determination and control system is an integral part of any satellite. For satellites in LEO an interaction with the local geomagnetic field is an important means of controlling the attitude or orientation. Attitude estimation is highly nonlinear due to the inherent nonlinearity in rotational kinematics, satellite attitude dynamics, and the nature of information through sensors, such as magnetometers. For attitude control, actuators must be based primarily on space and weight minimization. It uses three magnetic torque coils which are oriented orthogonally to each other. This paper describes the attitude determination and control in a closed loop configuration.
{"title":"Attitude determination and control system of Sathyabamasat","authors":"B. Sheela Rani, C. Gomathy, B. Sowmya, R. Narmadha","doi":"10.1109/RSTSCC.2010.5712821","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712821","url":null,"abstract":"A high-precision attitude determination and control of the sathyabama satellite is an essential task for the success of the whole mission. Satellite Attitude determination and control system is an integral part of any satellite. For satellites in LEO an interaction with the local geomagnetic field is an important means of controlling the attitude or orientation. Attitude estimation is highly nonlinear due to the inherent nonlinearity in rotational kinematics, satellite attitude dynamics, and the nature of information through sensors, such as magnetometers. For attitude control, actuators must be based primarily on space and weight minimization. It uses three magnetic torque coils which are oriented orthogonally to each other. This paper describes the attitude determination and control in a closed loop configuration.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"220 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132433970","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712798
B. Yamini, D. Vetri Selvi
The greatest environmental challenge today is global warming, which is caused by carbon emissions. A report by the Energy Information Administration says that about 98 percent of CO2 emissions (or 87 percent of all CO2- equivalent emissions from all greenhouse gases) can be directly attributed to energy consumption. The major challenge of many organizations today is a desire to operate in a “green” manner, publishing principles for environmental practices and sustainability on their corporate Web. In addition, many companies are now paying some kind of carbon tax for the resources they consume and the environmental impact of the products and services they produce, so a reduction in energy consumed can have a real financial payback. In this paper, we focus on reduction in energy consumption over the full equipment life cycle as the prime motivator for “green” application design; with energy reduction as the best measure of “green-ness”. Green IT refers to the study and practice of using computing resources in an efficient, effective and economic way. The various approaches of the green IT are Virtualization, Power management, Material recycling and Telecommuting. In which Virtualization platforms can run across hundreds of interconnected physical computers and storage devices, to create an entire virtual infrastructure. Cloud computing is the concept of equal sharing of resources among nodes. Cloud virtualization refers the process of running two or more logical computer systems on one set of hardware with equal sharing of resources. The challenge of the existing system is reduction of efficiency due server virtualization. In this paper, we propose a new system that connects more number of nodes with minimum number of servers. The sole motivation of this paper is reducing energy consumption using cloud virtualization clique star cover number technique.
{"title":"Cloud virtualization: A potential way to reduce global warming","authors":"B. Yamini, D. Vetri Selvi","doi":"10.1109/RSTSCC.2010.5712798","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712798","url":null,"abstract":"The greatest environmental challenge today is global warming, which is caused by carbon emissions. A report by the Energy Information Administration says that about 98 percent of CO2 emissions (or 87 percent of all CO2- equivalent emissions from all greenhouse gases) can be directly attributed to energy consumption. The major challenge of many organizations today is a desire to operate in a “green” manner, publishing principles for environmental practices and sustainability on their corporate Web. In addition, many companies are now paying some kind of carbon tax for the resources they consume and the environmental impact of the products and services they produce, so a reduction in energy consumed can have a real financial payback. In this paper, we focus on reduction in energy consumption over the full equipment life cycle as the prime motivator for “green” application design; with energy reduction as the best measure of “green-ness”. Green IT refers to the study and practice of using computing resources in an efficient, effective and economic way. The various approaches of the green IT are Virtualization, Power management, Material recycling and Telecommuting. In which Virtualization platforms can run across hundreds of interconnected physical computers and storage devices, to create an entire virtual infrastructure. Cloud computing is the concept of equal sharing of resources among nodes. Cloud virtualization refers the process of running two or more logical computer systems on one set of hardware with equal sharing of resources. The challenge of the existing system is reduction of efficiency due server virtualization. In this paper, we propose a new system that connects more number of nodes with minimum number of servers. The sole motivation of this paper is reducing energy consumption using cloud virtualization clique star cover number technique.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115044684","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712864
N. Jothilakshmi, R. Vedamuthu
This paper identifies the different planning approaches of new urbanism for planning a sustainable city. Transect is one such approach which enables a zoning of the city and the application of sustainable planning principles. The paper analyses the current planning approach in the study area-Chennai city- Land use Zoning Model with different Land use zoning regulations and the building development regulations for each zone according to the different abutting road widths, site areas and building use.
{"title":"An approach to build a sustainable city through the tools, models and methods of the new urbanism; Transect approach- a study of Chennai","authors":"N. Jothilakshmi, R. Vedamuthu","doi":"10.1109/RSTSCC.2010.5712864","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712864","url":null,"abstract":"This paper identifies the different planning approaches of new urbanism for planning a sustainable city. Transect is one such approach which enables a zoning of the city and the application of sustainable planning principles. The paper analyses the current planning approach in the study area-Chennai city- Land use Zoning Model with different Land use zoning regulations and the building development regulations for each zone according to the different abutting road widths, site areas and building use.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122364658","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712828
B. Sheela Rani, N. R. Krishnamoorthy, S. Harini, Krithika Padmanabhan, Kamaljeet Singh
In this paper, we present the objectives and features of the payload subsystem of SNSAT, the nanosatellite which is to be launched by SathyabamaUniversity in near future. The payload comprises of the spectrometer and its interface, with the prime aim to detect the concentration of five major constitutes green house gases namely, Carbon Dioxide, Water, Carbon Monoxide, Methane and Hydrogen Fluoride whose wavelength range between 900nm and 2.5μm (near infrared band). It records infrared radiation emitted from the Earth's surface. By absorption spectrometry, absorption and the column density of these gases can be obtained. Linear Indium Gallium Arsenide (InGaAs) photodiode detector array is employed. The array is hybrid InGaAs and CMOS active-pixel readout electronics. Detector has Spectral Resolution is approximately 6 nm. Optics employs 35 mm optics to collimate radiation from a 1 km tile onto a diffraction grating and then focus it onto the detector array. Data packets are processed and transmitted to the OBC subsystem using either RS232 interface or TLL logic at a period of 100ms. The payload is designed to consume less than 1 watts of power.
{"title":"Sathyabama nanosatellite - payload subsystem","authors":"B. Sheela Rani, N. R. Krishnamoorthy, S. Harini, Krithika Padmanabhan, Kamaljeet Singh","doi":"10.1109/RSTSCC.2010.5712828","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712828","url":null,"abstract":"In this paper, we present the objectives and features of the payload subsystem of SNSAT, the nanosatellite which is to be launched by SathyabamaUniversity in near future. The payload comprises of the spectrometer and its interface, with the prime aim to detect the concentration of five major constitutes green house gases namely, Carbon Dioxide, Water, Carbon Monoxide, Methane and Hydrogen Fluoride whose wavelength range between 900nm and 2.5μm (near infrared band). It records infrared radiation emitted from the Earth's surface. By absorption spectrometry, absorption and the column density of these gases can be obtained. Linear Indium Gallium Arsenide (InGaAs) photodiode detector array is employed. The array is hybrid InGaAs and CMOS active-pixel readout electronics. Detector has Spectral Resolution is approximately 6 nm. Optics employs 35 mm optics to collimate radiation from a 1 km tile onto a diffraction grating and then focus it onto the detector array. Data packets are processed and transmitted to the OBC subsystem using either RS232 interface or TLL logic at a period of 100ms. The payload is designed to consume less than 1 watts of power.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125228648","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712819
B. Sheela Rani, T. Mahesh Babu, M. Srinivasan
A satellite basically any object that revolves around a planet in a circular or elliptical orbit path. Nano satellites are satellites that weigh less than 10Kg. These types of satellites are designed and developed to carry payloads that are much smaller and has a life span not more than 1 year generally. Sathyabama University has taken up a task of designing and developing a nano satellite for pollution monitoring. This nano satellite named “SATHYABAMA SATELLITE” is designed to detect the presence of green house gases in the atmosphere and to map them in the later stage. This paper gives a comprehensive view of the structural design and development of such a nano satellite.
{"title":"Comparative study of different structures of nanosatellite and its analysis","authors":"B. Sheela Rani, T. Mahesh Babu, M. Srinivasan","doi":"10.1109/RSTSCC.2010.5712819","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712819","url":null,"abstract":"A satellite basically any object that revolves around a planet in a circular or elliptical orbit path. Nano satellites are satellites that weigh less than 10Kg. These types of satellites are designed and developed to carry payloads that are much smaller and has a life span not more than 1 year generally. Sathyabama University has taken up a task of designing and developing a nano satellite for pollution monitoring. This nano satellite named “SATHYABAMA SATELLITE” is designed to detect the presence of green house gases in the atmosphere and to map them in the later stage. This paper gives a comprehensive view of the structural design and development of such a nano satellite.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125662573","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 : 2010-11-01DOI: 10.1109/RSTSCC.2010.5712848
A. Venkatesan, S. Venkat Kumar
In this paper various approaches of implementing a hardware efficient fast convolution have been discussed. Long length convolutions implemented on a FPGA are not area, power efficient and also it cannot be implemented on a single FPGA. To increase the speed of long convolutions and to meet the calculation capacity of each single FPGA chip, the long coefficient sequence can be partitioned into short sub-sequences. Each short length convolution can then be made area efficient at the expense of decrease in speed by implementing them as a convolution ASIP. The asynchronous ASIP is still faster than a synchronous ASIP. The speed of an asynchronous convolution processor can be further increased by applying Algorithmic Strength Reduction (ASR) where the number of multiplications, (which is more time consuming than an addition) is alleviated at the expense of increase in the number of additions required in a convolution process. Several algorithms based on ASR which would lead to a faster convolution ASIP have been discussed.
{"title":"Efficient implementation of fast convolution in ASIP","authors":"A. Venkatesan, S. Venkat Kumar","doi":"10.1109/RSTSCC.2010.5712848","DOIUrl":"https://doi.org/10.1109/RSTSCC.2010.5712848","url":null,"abstract":"In this paper various approaches of implementing a hardware efficient fast convolution have been discussed. Long length convolutions implemented on a FPGA are not area, power efficient and also it cannot be implemented on a single FPGA. To increase the speed of long convolutions and to meet the calculation capacity of each single FPGA chip, the long coefficient sequence can be partitioned into short sub-sequences. Each short length convolution can then be made area efficient at the expense of decrease in speed by implementing them as a convolution ASIP. The asynchronous ASIP is still faster than a synchronous ASIP. The speed of an asynchronous convolution processor can be further increased by applying Algorithmic Strength Reduction (ASR) where the number of multiplications, (which is more time consuming than an addition) is alleviated at the expense of increase in the number of additions required in a convolution process. Several algorithms based on ASR which would lead to a faster convolution ASIP have been discussed.","PeriodicalId":254761,"journal":{"name":"Recent Advances in Space Technology Services and Climate Change 2010 (RSTS & CC-2010)","volume":"47 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120806378","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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