Presented by:
Rodger E. Ziemer


3G CDMA - WCDMA and cdma2000
Rules for Efficient Multiple Access
Three laws
 Know the channel
 Minimize interference to others
 Mitigate interference received from others
 Requirements of wireless multiple access
 Channel measurement
 Channel control and modification
 Multiple user channel isolation
Why CDMA?
 Higher capacity
 Improved performance in multipath by diversity
 Lower mobile transmit power = longer battery life
 ....etc

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CDMA Technology

Abstract :

CDMA was developed by QUALCOMM Incorporated, a company in San Diego, California. QUALCOMM engineers decided to do something different and applied spread spectrum techniques to a multiple access system, which ultimately became CDMA.
In spread spectrum, instead of giving each person a channel, or each group of 3 or 8 people a time slot, CDMA puts everyone in the same channel at the same time.
At first thought, it would seem to be an impossible task to make work, but it does work. The reason it works is expla ....etc

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please help me out soon within 12 hrs as i have to attend an exam please help me out.......... ....etc

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ABSTRACT

The DS - CDMA is expected to be the major medium access technology in the future mobile systems owing to its potential capacity enhancement and the robustness against noise. The CDMA is uniquely featured by its spectrum spreading randomization process employing a pseudo-noise (PN) sequence, thus is often called the spread spectrum multiple access (SSMA). As different CDMA users take different PN sequences, each CDMA receiver can discriminate
and detect its own signal, by regarding the signals transmitted by other u ....etc

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Distributed power control and spreading gain allocation
in CDMA data networks
Abstract
We study the radio resource allocation problem of distributed joint transmission power control
and spreading gain allocation in a DS-CDMA mobile data network. The network consists of
K base stations and M wireless data users. The data streams generated by the users are treated
as best-effort traffic, in the sense that there are no prespecified constraints on the quality of the
radio channels. We are interested in designing a distributed algorit ....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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QRD “ RLS ADAPTIVE EQUALIZER AND CORDIC
ALGORITHM FOR CDMA SYSTEMS
Presented By:
K.L.Pragathi (IV ECE) Grace Shilpa (IV ECE)
SKTM College of Engineering Kodair, Mahaboob Nagar - Dist

ABSTRACT:
To combat the performance deterioration brought by the time-varying propagation conditions and multiuser / intersymbol interference in the CDMA system, this paper proposes a novel means of adaptive equalizer based on QR Decomposition-based Recursive LeastSquare (QRD-RLS) algorithm to replace the convent ....etc

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Please send me circuit diagram of advanced mobile phone signal jammer for gsm cdma and 3g networks with prescheduled time duration using arm 7 tdmi processor and its description,working and related things to email id- [email protected] ....etc

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please send the report for this project my email id is [email protected]
....etc

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looking for advantages and disadvantages of cdma technology pdf ? ....etc

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