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

[:=Read Full Message Here=:]

Abstract
Wireless ad hoc networks provide a new dimension to computing by allowing a group of portable devices to talk to each other without any additional infrastructure and have been the focus of research in the area of wireless networks. CDMA has been gaining popularity as the multiaccess technique and is part of many wireless standards now. In this project we present techniques to improve performance of the CDMA based wireless ad hoc systems and present results based on extensive simulations. The resource utilization of network in a ....etc

[:=Read Full Message Here=:]

Presented By:-
Siddhartha Panda


INTRODUCTION
WCDMA stands for Wide Band Code Division Multiple Access.
W-CDMA is a Third-Generation(3G) mobile wireless technology that promises much higher data speeds to mobile and portable wireless devices than commonly offered in today's market.
It is specified by 3rd Generation Partnership Project (3GPP).
It is the key technology for UMTS.
HISTORY
QUALCOMM , the first company to succeed in developing a practical and cost effective CDMA implementation for co ....etc

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

I have needsome improve BER and SNR in MC CDMA
which are the best technic and how to improved using mat lab code
So please help me
Thank you ....etc

[:=Read Full Message Here=:]

Abstract
The ordinary CDMA technology has the disadvantage of identifying the users using the appropriate signature of each user. Since many users tend to use the transmission media, there is always a chance for superimposition of signals that can cause interference in network.

The solution for this inconvenience comes in the form of interleaving which separates the users. This special form of CDMA technology offers some of the features of CDMA such as the dynamic channel sharing, mitigation of cross cell reference, asynchronous tran ....etc

[:=Read Full Message Here=:]

we required matlab code and documentation for the project implementation of cdma signaling technique using matlab with code. ....etc

[:=Read Full Message Here=:]

I need a code to combine the interleaver design for cdma and ofdm? Is such a design possible and if so can u pls give the code? ....etc

[:=Read Full Message Here=:]

I'M TRYING TO COMPARE MC-CDMA AND MC-DS-CDMA USING SINGLE USER AND
MULTI-USER DETECTION TECHNIQUES IN TERMS OF BIT ERROR RATE AND
SPECTRAL EFFICIENCY IN A MOBILE COMMUNICATION USING MATLAB. ....etc

[:=Read Full Message Here=:]

plz I want the code of ds cdma uwb
this is my mail
[email protected]
thank you ....etc

[:=Read Full Message Here=:]