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Title: Indian Telecom Scene- CDMA-vs-GSM or Spectrum technology
Page Link: Indian Telecom Scene- CDMA-vs-GSM or Spectrum technology -
Posted By: project report helper
Created at: Saturday 25th of September 2010 06:24:46 PM
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Indian Telecom Scene- CDMA-vs-GSM or Spectrum technology
presented by:
b.b anand
president
Reliance Infocomm Ltd.
Vijaya Building, 13th Floor,17, Barakhamba Road,
New Delhi
Indian telecoms at current value
-India – a dynamic & vibrant economy - about 7 to 8 % GDP growth
-Tele density : Risen from less than 2% in 2000 to 8.80 %by Jan’2005
-Total subscribers base in India 94.92 million by the end of Jan’05.
-Wireless subscribers at the end of Jan’05 is ....etc
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Title: spread spectrum multiple access full report
Page Link: spread spectrum multiple access full report -
Posted By: project report tiger
Created at: Tuesday 02nd of February 2010 12:39:29 PM
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1. INTRODUCTION
Code Division Spread Spectrum is one form of CDMA communication technique optimized for the cost conscious, high volume and short cycle consumer electronics market. Its primary application is in digital cordless telephony today. Meanwhile, it is being applied to wireless devices for the last 100-meter connection to the Internet, and in the wireless local loop to provide sub-$20 handset cost, tariff free mobile voice services in some third world countries.
Why is CD/SS technology suitable for consumer e ....etc
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Title: Grouping Technique for Cooperative Spectrum Sensing in Cognitive Radios
Page Link: Grouping Technique for Cooperative Spectrum Sensing in Cognitive Radios -
Posted By: project report helper
Created at: Friday 22nd of October 2010 08:00:30 PM
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Grouping Technique for Cooperative Spectrum Sensing in Cognitive Radios
Rizwan Akhtar, Adnan Rashdi and Abdul Ghafoor
Electrical Engineering Department, College of Signals, National University of Science & Technology, Pakistan
Abstract—
Cognitive networks can potentially solve the
problems of spectrum scarcity by accommodating unlicensed
(secondary) users in under-utilized segments of the spectrum.
Spectrum sensing serves as the primary stimulus for a cognitive
radio an ....etc
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Title: Spread-spectrum communications technology
Page Link: Spread-spectrum communications technology -
Posted By: seminar class
Created at: Monday 21st of March 2011 11:48:02 AM
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1.1WHAT IS SPREAD SPECTRUM?
Spread-spectrum techniques are methods by which a signal (e.g. an electrical,electromagnetic, or acoustic signal) generated in a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. These techniques are used for a variety of reasons, including the establishment of securecommunications, increasing resistance to natural interference and jamming, topreventdetection, and to limit power flux density (e.g. in satellite downlinks).
S ....etc
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Title: Efficient Node Admission and Certificateless Secure Communication in Short-Lived MANE
Page Link: Efficient Node Admission and Certificateless Secure Communication in Short-Lived MANE -
Posted By: computer science crazy
Created at: Thursday 17th of September 2009 05:25:33 AM
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Efficient Node Admission and Certificateless Secure Communication in Short-Lived MANETs
Decentralized node admission is an essential and fundamental security service in mobile ad hoc networks (MANETs).It is needed to securely cope with dynamic membership and topology as well as to bootstrap other important security primitives (such as key management) and services (such as secure routing) without the assistance of any centralized trusted authority.An ideal admission technique must involve minimal interaction among MANET nodes, since connectiv ....etc
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Title: Zoom-FFT Spectrum Analyzer full report
Page Link: Zoom-FFT Spectrum Analyzer full report -
Posted By: seminar presentation
Created at: Tuesday 18th of May 2010 11:51:07 PM
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Zoom-FFT Spectrum Analyzer
Presented By:
Ling Feng
s020983
Jinxu Huang
s021102
1. Introduction
Nowadays we contact with various signals everyday. We need to analysis and utilize these signals. In many situations there ....etc
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Title: Implementation Issues in Spectrum Sensing for Cognitive Radios
Page Link: Implementation Issues in Spectrum Sensing for Cognitive Radios -
Posted By: seminar surveyer
Created at: Wednesday 20th of October 2010 07:39:59 PM
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Abstract
There are new system implementation challenges involved in the design of cognitive radios, which have both the ability to sense the spectral environment and the flexibility to adapt transmission parameters to maximize system capacity while co-existing with legacy wireless networks. The critical design problem is the need to process multi-gigahertz wide bandwidth and reliably detect presence of primary users. This places severe requirements on sensitivity, linearity, and dynamic range of the circuitry in the RF front-e ....etc
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Title: A PIPELINE FAST FOURIER TRANSFORM FOR DIGITAL SPECTRUM ANALYSIS
Page Link: A PIPELINE FAST FOURIER TRANSFORM FOR DIGITAL SPECTRUM ANALYSIS -
Posted By: computer science crazy
Created at: Friday 18th of September 2009 12:25:22 AM
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A PIPELINE FAST FOURIER TRANSFORM FOR DIGITAL SPECTRUM ANALYSIS
Abstract:- This paper describes a novel structure for a hardwired fast Fourier transform (FFT) signal processor that promises to permit digital spectrum analysis to achieve throughput rates consistent with extremely wide-band radars. The technique is based on the use of serial storage for data and intermediate results and multiple arithmetic units each of which carries out a sparse Fourier transform. Details of the system are described for data sample sizes that are binary multi ....etc
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Title: Spread Spectrum
Page Link: Spread Spectrum -
Posted By: electronics seminars
Created at: Tuesday 22nd of December 2009 05:52:34 PM
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Abstract:
Spread spectrum is a form of wireless communications in which the frequency of the transmitted signal is deliberately varied. This result in a much greater bandwidth than the signal would have if its frequency were not varied.A conventional wireless signal has a frequency, and are methods by which electromagnetic energy generated in a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth usually specified in megahertz (MHz) or gigahertz gigahertz), that doe ....etc
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Title: Digital Invisible Ink Data Hiding Based on Spread-Spectrum
Page Link: Digital Invisible Ink Data Hiding Based on Spread-Spectrum -
Posted By: seminar class
Created at: Tuesday 15th of March 2011 07:03:43 PM
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ABSTRACT
A novel data-hiding methodology, denoted as digital invisible ink (DII), is proposed to implement secure steganography systems. Like the real-world invisible ink, secret messages will be correctly revealed only after the marked works undergo certain prenegotiated manipulations, such as lossy compression and processing. Different from conventional data-hiding schemes where content processing or compression operations are undesirable, distortions caused by prenegotiated manipulations in DII-based schemes are indispensable steps for ....etc
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