The world is demanding more from wireless communication technologies than ever before. More people around the world are subscribing to wireless services and consumers are using their phones more frequently. Exciting Third-Generation (3G) wireless data services and applications - such as wireless email, web,digital picture taking/sending and assisted-GPS position location applications - and wireless networks have also arrived and asked to do much more than just a few years ago. This is where CDMA technology fits in. CDMA consistently provides be ....etc

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Abstract

The paper introduces the principles, methods, and strategies of Object-Oriented database design. Based on the carefully defined file object manipulating functions, the implementation of an OO Base is presented in detail. ....etc

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I WOULD LIKE TO MAKE A PROJECT BY INTERFACING GPS MODEM WITH 8051 MICRO CONTROLLER FOR RETRIEVING THE LONGITUDE AND LATITUDE OF A LOCATION. HENCE I NEED COMPLETE CIRCUIT DIAGRAM AND PROGRAMMING CODE FOR THIS PURPOSE

WITH REGARDS

J.JAGANNAYAKULU ....etc

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Base Station System



MTNL BSS ( Shadipur


It houses the BSS, which is responsible for controlling GSM mobile operations in the cell at or near shadipur & karol bagh area.

They have installed components and other subsytem from reputed firms like Huawei , Alcatel and Motorola.

These high performance systems do all necessary operation so that order and stability is maintained throughout the system.


What is GSM ?


The Global System for ....etc

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i like to know about the following project so i need the material of this project gps based ststion announcement system in train

....etc

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abstract
existing system
proposed system
hardware requirement
software requirement
module description
data flow diagram
....etc

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Efficiency Improvement of WCDMA Base Station Transmitters using Class-F power amplifiers


Muthuswamy Venkataramani



(ABSTRACT)
Universal Mobile Telecommunications Systems (UMTS) is the preferred third generation (3G) communication standard for mobile communications and will provide worldwide coverage, a convenient software technology and very high data rate. The high data rate, especially, requires the use of bandwidth-efficient modulation schemes such as Quadrature Phase Shift Keying (QPSK). But ....etc

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Overview
Code division multiple access (CDMA) is a modulation and multiple-access scheme based on spread-spectrum communication. In this scheme, multiple users share the same frequency band at the same time, by spreading the spectrum of their transmitted signals, so that each user's signal is pseudo-orthogonal to the signals of the other users.

CDMA Signals
In a CDMA system, each signal consists of a different pseudorandom binary sequence (called the spreading code) that modulates a carrier, spreading the spectrum of the waveform. A large ....etc

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Introduction
A base transceiver station or cell site (BTS) is a piece of equipment that facilitates wireless communication between user equipment (UE) and a network. UEs are devices like mobile phones (handsets), WLL phones, computers with wireless internet connectivity, WiFi and WiMAX gadgets etc. The network can be that of any of the wireless communication technologies like GSM, CDMA, WLL, WAN, WiFi, WiMAX etc. BTS is also referred to as the radio base station (RBS), node B (in 3G Networks) or, simply, the base sta ....etc

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Author: Dong-Hahk Lee Anna Choi Jun-Mo Koo Jin-Ick Lee Byung Moo Kim
Central Res. & Dev. Lab., SK Telecom, Sungnam City, South Korea;


Abstract:

This paper presents the design, implementation and test results of a complete wideband CDMA modem with a modulator and a demodulator for use in next-generation mobile stations. The modem is based on NTT DoCoMo's proposal for the next generation W-CDMA air interface. The modulator supports multicode transmission capability, which enables three dedicated physical channels to be t ....etc

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