i am learning mobile communications.so please provide some info ....etc

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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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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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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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help me in finding a propper report on aerodynamics ....etc

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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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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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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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PRESENTED BY:
S ADITYA THIMMA REDDY
PUSHPAVALLI R
P VENKATA KRISHNA TEJA
S PENNA OBULAMMA


Abstract
Spread-spectrum telecommunications is a signal structuring technique that employs direct sequence, frequency hopping, or a hybrid of these, which can be used for multiple access and/or multiple functions. This technique decreases the potential interference to other receivers while achieving privacy. Frequency-hopping spread spectrum (FHSS), direct-sequence spread spectrum (DSSS ....etc

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spectrum of manet applications, routing and various routing algoriths ....etc

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