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Nagal R.,ASET | Kumar P.,Amity University | Bansal P.,MSIT
Proceedings of the 5th International Conference on Confluence 2014: The Next Generation Information Technology Summit | Year: 2014

This paper presents the implementation of adaptive algorithms like Least Mean Square (LMS) and Normalized Least Mean Square (NLMS) in the frequency domain and their comparison to that implemented in the time domain. Adaptive filtering using adaptive algorithm in frequency domain can be done by taking Fourier Transform of input signal and independent weigh coefficient. By frequency domain approach significant reduction in mathematical computation has been achieved. An expression for updating the weights is implemented in the frequency domain and statistical analysis has been performed. The SNR (Signal to Noise Ratio) is a parameter used to evaluate the performance with different step size. The signal power and noise power has also been calculated using MATLAB. The SNR of output signal rises about 8-9 times in frequency domain than the time domain. © 2014 IEEE. Source


Nagpal R.,ASET | Bhatia P.,G.J.U.
2010 International Conference on Computer and Communication Technology, ICCCT-2010 | Year: 2010

Today a major drift is observed from static website to dynamic websites. The dynamic websites deliver the customized contents to their users. These websites cover a wide spectrum of applications which largely vary in its content, configuration and volume of traffic. The popular metrics designed to evaluate a dynamic website are response time, user satisfaction, performance, scalability, usability, personalization, reliability, reusability and security. But for dynamic website delivery, update, consistency maintenance are main hurdles. To overcome them and to serve and deliver the contents efficiently for dynamic website researchers have proposed several caching mechanisms with an aim to reduce the construction overhead to improve the response time as well as reusability of its contents. A great research has been performed on various aspects of caching. Based on these the caching techniques are classified depending on its location, content, replacement, replication and updation strategy and many more. A caching technique can be suitable for one website and may not be effective for other website, depending upon the configuration, content and application of website one should choose the suitable caching technique. Thus a need of designing a set of metrics on which these caching techniques can be evaluated is much required. In this paper we will study about the classification of caching techniques and then discuss the issues related to caching and various criteria on which metrics are needed to be designed to evaluate the effectiveness of caching techniques. ©2010 IEEE. Source


Malhotra Y.,ASET | Kaler R.S.,Thapar University
Optik | Year: 2012

We investigate the performance of the Super Dense Wavelength Division Multiplexed (SDWDM) systems with high spectral efficiency and narrow spacing of the channels and optimization in terms of bit rate up to 15 Gbps, channel spacing as low as 12.5 GHz, number of channels up to 64 and repeater less transmission distance up to 100 km and report high capacity SDWDM systems. We demonstrate the minimal allowed channel spacing and provide recommendations for future SDWDM solutions. The simulation results have shown that the minimum channel spacing for 15 Gbps, 32 channel system need to be not less than 0.35 nm and that for a 10 Gbps system it should be not less than 0.25 nm. The 5 Gbps system gives acceptable results at spacing of 0.1 nm for maximum up to single span of 80 km. © 2011 Elsevier GmbH. All rights reserved. Source


Verma S.,ASET | Kumar S.,Thapar University
International Journal of Physical Sciences | Year: 2011

The key issue of applying Turbo codes is to find an efficient implementation of turbo decoder. This paper addresses the implementation of a simplified and efficient turbo decoder in field programmable gate array (FPGA) technology. A simplified and efficient implementation of a Turbo decoder with minor performance loss has been proposed. An integer Turbo decoder based on the standard 2's complement number system after considering the issues of dynamic range, truncation effect and other algorithm related subjects has been introduced. The efficient implementation comes from algorithm modification, integer arithmetic and compact hardware management. Based on the Max-Log-MAP decoding algorithm, the branch metric is modified by weighting a priori value, resulting in a significant BER improvement. The Turbo decoder takes in 8-level integer inputs generates 7-bit soft-decisions and calculates all metrics on integers, avoiding complex floating point or fixed-point arithmetic. By manipulating memory address, delay associated with interleaving and de-interleaving is eliminated, resulting in much higher throughput. Also, by taking advantage of identical decoder function, Turbo decoder is implemented in a single-decoder structure, making efficient use of memory and logic cells. © 2011 Academic Journals. Source


Verma A.,ASET
Proceedings of the 2013 International Conference on Green Computing, Communication and Conservation of Energy, ICGCE 2013 | Year: 2013

Since last few years, security systems are getting more awareness and importance. A Multi Layer Bank Security System is a system for validating, monitoring and controlling the security at bank locker rooms. Today, there are many banks using authorize access control approach to prevent the locker room from unauthorized access. In this paper highly reliable, multi level and most efficient locker room security system has been designed. The system includes a biometric system, i.e. a fingerprint scanner and an iris scanner, which are responsible for the security of the main door of the locker room and the system also includes a RFID system to provide access of the locker room area to only authorize people. To monitor the unauthorized people in the locker room area a passive infrared sensor is fixed. In case of any unauthorized motion the picture from the camera will be mailed to security officials and the alarms will be on to inform the local security. The system proposed in this paper is a better security system in terms of number of level of security. © 2013 IEEE. Source

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