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Co-Authors
- S. V. Viraktamath
- Attimarad
- Praveen M. Purohit
- Shweta S. Kulkarni
- Suhas Kulkarni
- D. Anish Nirmal
- K. Arunkumar
- R. Arunkumar
- K. Sankarasubramanian
- Manju Sudhakar
- Anuj Nandi
- M. C. Ramadevi
- Abhijit Avinash Adoni
- Ankur Kushwaha
- Anil Agarwal
- Arjun Dey
- Bhuwan Joshi
- Brajpal Singh
- Ishan Tomar
- Kamal Kumar Majhi
- Kumar
- Manjunath Olekar
- Monoj Bug
- Manohar Pala
- Mukund Kumar Thakur
- Rajeev R. Badagandi
- B. T. Ravishankar
- Sarthak Garg
- N. Sitaramamurthy
- N. Sridhara
- C. N. Umapathy
- Vinod Kumar Gupta
- Vivek Kumar Agrawal
- B. Yougandar
- S. Seetha
- V. Koteswara Rao
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Girish, V.
- Impact of Generator Polynomial on Performance of MAP Turbo Decoder in AWGN Channel
Abstract Views :139 |
PDF Views:3
Authors
S. V. Viraktamath
1,
V. Girish
,
Attimarad
2,
Praveen M. Purohit
1,
Shweta S. Kulkarni
1,
Suhas Kulkarni
1
Affiliations
1 ECE Department, S.D.M.C.E.T, Dharwad, Karnataka, IN
2 ECE Department, D.S. College of Engineering, Bangalore, Karnataka, IN
1 ECE Department, S.D.M.C.E.T, Dharwad, Karnataka, IN
2 ECE Department, D.S. College of Engineering, Bangalore, Karnataka, IN
Source
Wireless Communication, Vol 3, No 11 (2011), Pagination: 797-801Abstract
Turbo coding is the most commonly used error correcting scheme in wireless systems resulting in maximum Coding gain. The MAP algorithm is a basic algorithm for turbo decoding. In this paper, authors analyze the performance of turbo MAP algorithm in terms of bit error rate (BER), considering different parameters like signal to noise ratio (SNR), generator polynomials and length of generator polynomial on Additive White Gaussian Noise (AWGN) channel. Simulation of Turbo encoder and Turbo MAP decoder is done. BER and processing time are computed for a range of SNR,considering different generator polynomials of same length and also for generator polynomials of different length, keeping the input constant. Simulation results show that BER for all the generator polynomial of same length is not same for a given SNR. Same is the case with processing time. BER for a given SNR decreases as the length of generator polynomial is increased whereas processing time increases with increase in generator polynomial length.
Keywords
Convolutional Codes, Maximum A-Posteriori (MAP), Performance, Turbo Codes.
- Setting Up Based Private Cloud Using Open Stack
Abstract Views :169 |
PDF Views:2
Authors
Affiliations
1 Computer Science and Engineering, JCT-College of Engineering and Technology, Anna University, Chennai, Tamilnadu, IN
1 Computer Science and Engineering, JCT-College of Engineering and Technology, Anna University, Chennai, Tamilnadu, IN
Source
Networking and Communication Engineering, Vol 6, No 5 (2014), Pagination: 177-182Abstract
Cloud computing has elevated IT to newer limits by offering the market environment data storage and capacity with flexible scalable computing processing power to match elastic demand and supply, whilst reducing capital expenditure. Cloud services are supported both by Proprietary and Open Source Systems. As Proprietary products are very expensive, customers are not allowed to experiment on their product and security is a major issue in it, Open source systems helps in solving out these problems. Cloud Computing motivated many academic and non academic members to develop Open Source Cloud Setup, here the users are allowed to study the source code and experiment it. This paper describes the configuration of a private cloud using Open Stack. Open Stack an open source system has been used to implement a private cloud using the hardware and software without making any modification to it and provide various types of services to the cloud computing environment.Keywords
Cloud Computing, Open Source, Private Cloud.- X-Ray Spectrometers On-Board Aditya-L1 for Solar Flare Studies
Abstract Views :212 |
PDF Views:66
Authors
K. Sankarasubramanian
1,
Manju Sudhakar
1,
Anuj Nandi
1,
M. C. Ramadevi
1,
Abhijit Avinash Adoni
1,
Ankur Kushwaha
1,
Anil Agarwal
1,
Arjun Dey
1,
Bhuwan Joshi
2,
Brajpal Singh
1,
V. Girish
1,
Ishan Tomar
1,
Kamal Kumar Majhi
1,
Kumar
1,
Manjunath Olekar
1,
Monoj Bug
1,
Manohar Pala
1,
Mukund Kumar Thakur
1,
Rajeev R. Badagandi
1,
B. T. Ravishankar
1,
Sarthak Garg
1,
N. Sitaramamurthy
1,
N. Sridhara
1,
C. N. Umapathy
1,
Vinod Kumar Gupta
1,
Vivek Kumar Agrawal
1,
B. Yougandar
1
Affiliations
1 ISITE Campus, ISRO Satellite Centre, Outer Ring Road, Marathahalli, Bengaluru 560 037, IN
2 Udaipur Solar Observatory, Physical Research Laboratory, Udaipur 313 004, IN
1 ISITE Campus, ISRO Satellite Centre, Outer Ring Road, Marathahalli, Bengaluru 560 037, IN
2 Udaipur Solar Observatory, Physical Research Laboratory, Udaipur 313 004, IN
Source
Current Science, Vol 113, No 04 (2017), Pagination: 625-627Abstract
Aditya-L1 mission will carry two high-spectral resolution X-ray spectrometers to study solar flares. The soft X-ray spectrometer will cover the energy range from 1 to 30 keV, while the hard X-ray spectrometer will cover from 10 to 150 keV. These two instruments together will provide opportunities to study the plasma parameters during solar flares as well as acceleration mechanisms of energetic particles during the flaring time.Keywords
Coronal Heating, Solar Flares, X-Ray Spectrometers.Full Text
References
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- Hannah, I. G. et al., Microflares and the statistics of X-ray flares. Space Sci. Rev., 2011, 159, 263–300.
- Narendranath, S. et al., Elemental abundances in the solar corona as measured by the X-ray solar monitor onboard Chandrayaan-1. Sol. Phys., 2014, 289, 1585–1595.
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- Project AstroSat: Five Years of Operations and Continuing
Abstract Views :254 |
PDF Views:84
Authors
Affiliations
1 Raman Research Institute, Bengaluru 560 08, IN
2 ISRO Headquarters, Bengaluru 560 231, IN
3 U.R. Rao Satellite Centre, Bengaluru 560 017, IN
1 Raman Research Institute, Bengaluru 560 08, IN
2 ISRO Headquarters, Bengaluru 560 231, IN
3 U.R. Rao Satellite Centre, Bengaluru 560 017, IN
Source
Current Science, Vol 121, No 2 (2021), Pagination: 214-221Abstract
India’s first dedicated multi-wavelength satellite, AstroSat, was launched by PSLV C30 from the Satish Dhawan Space Centre, Sriharikota, Andhra Pradesh on 28 September 2015. It is India’s first multiwavelength observatory. AstroSat carries five scientific payloads and is capable of simultaneous observations from ultraviolet to very hard X-rays. It has completed five years of on-board operations in September 2020 as a proposal-based observatory. Currently, it has close to 1500 global users and has resulted in more than 150 articles in peer-reviewed journals. This article is an overview providing a brief description of the AstroSat mission and some recent results using data from this unique Indian space observatory.Keywords
Multi-Wavelength Satellite, Proposal-Based Space Observatory, Scientific Payloads, Ultraviolet and X-Ray Astronomy.Full Text
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