CDMA
The world is demanding more from wireless communication technologies than ever before as more people around the world are subscribing to wireless. Add in exciting Third-Generation (3G) wireless data services and applications - such as wireless email, web, digital picture taking/sending, assisted-GPS position location applications, video and audio streaming and TV broadcasting - and wireless networks are doing much more than just a few years ago.
This is where CDMA technology fits in. CDMA consistently provides better capacity for voice and ....etc

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Topic: fuzzy based call admission control in wideband cdma cellular networks

ABSTRACT
In this paper, a novel call admission control (CAC) scheme using fuzzy logic is proposed for the reverse page link transmission in wideband code division multiple access (CDMA) cellular communications. The fuzzy CAC scheme first estimates the effective bandwidths of the call request from a mobile station (MS) and its mobility information, and then makes a decision to accept or reject the connection request based on ....etc

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Multiple access (MA) schemes are used to simultaneously share available bandwidth in communication systems. In conventional MA applications a finite and contiguous amount of spectrum which is designated for a particular service is allocated to multiple users. Therefore, the use of designated radio spectrum is unconstrained and can be utilized in many ways to achieve maximum efficiency. Time division multiple access (TDMA), frequency division multiple access (FDMA), and code division multiple access (CDMA) are the three major MA techniques. In r ....etc

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ABSTRACT
Machine health monitoring is of critical importance to its safe and reliable operation. The emergence of wireless data transmission techniques has extended the Scope of health monitoring to machine components and systems that are difficult to accessor not suited for wired sensor data acquisition .this paper presents the design and prototype realization of a digital wireless data transmitter based on the CDMA technique.
The design provides a generic solution for various applications ....etc

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INTRODUCTION


Mobile communications are rapidly becoming more and more necessary for everyday activities. With so many more users to accommodate, more efficient use of bandwidth is a priority among cellular phone system operators. Equally important is the security and reliability of these calls. One solution that has been offered is a CODE DIVISION MULTIPLE ACCESS SYSTEM.

CDMA is one method for implementing a multiple access communication system. MULTIPLE ACCESS is ....etc

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CELLULAR AND MOBILE COMMUNICATIONS DS-CDMA
Presented By:
V.VIJAYA KUMAR, IV B.Tech E.C.E
SREE VIDYANIKETHAN ENGINEERING COLLEGE ,TIRUPATI


ABSTRACT

So far transmission errors have been described as evil entity in communication literature. Introducing error intentionally can save power and reduce interference. This has been proved by scientists Jik Dong Kim (South Korea), Sang Wu Kim (USA) and Young Gil Kim (South Korea). It is about combined power and error control in multicarrier DS-CDMA systems ....etc

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This article is presented by:
Malathy Elumalai
Advance topics in Communication
Spring 2010

COMPARISON OF CDMA AND TDMA SYSTEMS
ABSTRACT
In this report two candidates for high capacity cellular systems are simulated and analyzed, one CDMA and one TDMA system. Simulations of the CDMA example indicate a high sensitivity to variations in certain system parameters. The TDMA example is a GSM system using rand ....etc

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want to know what is optical CDMA ?why for it use ? what are the advantages and disadvanages of it ? ....etc

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A Surveillance Robot with Hopping Capabilities for Home Security

Abstract
Most traditional home robots have always had problems with stairs, doorsills and other
obstacles that humans cross with ease in cluttered indoor environments. This paper
presents the development and characterization of a surveillance robot with hopping
capabilities for home security. The proposed robot can leap over obstacles. It can also roll
freely on flat floors and change its directions by the two-wheeled differential drive
system. It adopts the Zi ....etc

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A High Data Rate Frequency Hopping Modulation Scheme
Theme:ECE/Digital Communications

Submited By:
Hemanth Patnala
R.V.Seshu Kumar
Sir C.R.R. College Of Engineering,
Eluru-534002
ABSTRACT
There is a need to select the 'first step up' modulation scheme for higher data rate frequency hopping systems. This is seen as one step in a longer journey where considerably higher data rates are used. In order to make this progression viable, the first step should be taken with a well proven modulation scheme. An ....etc

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