looking for ofdma block diagram explanation details pdf ....etc

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ABSTRACT

In recent years, Broadband technology has rapidly become an established, global commodity required by a high percentage of the population. The demand has risen rapidly, with a worldwide installed base of 57 million lines in 2002 rising to an estimated 80 million lines by the end of 2003. This healthy growth curve is expected to continue steadily over the next few years and reach the 200 million mark by 2006. DSL operators, who initially focused their deployments in densely-populated urban and metropolitan areas, are now challenged t ....etc

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THE ELECTRICAL ENERGY MEASURMENT DATA ACQUISITION ENGINEERING BASED ON SCDMA
Presented by
JAYAKRISHNAN S R
S7 E1
College Of Engineering, Trivandrum
2007-11 batch



Abstract

The electrical energy measurement data is the basis of estimating electrical energy supply and sales related cost; also it is important information which analyzes the loss of electrical energy transmission and the efficiency of electrical energy consumption. The electrical energy measurement stations are not on ....etc

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FIXED AND MOBILE WIMAX

ABSTRACT

Within the last two decades, communication advances have reshaped the way we live our daily lives. Wireless communications has grown from an obscure, unknown service to an ubiquitous technology that serves almost half of the people on Earth. Whether we know it or not, computers now play a dominant role in our daily activities, and the Internet has completely reoriented the way people work, communicate, play, and learn. However severe the changes in our lifestyle may seem to have been ov ....etc

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WiMAX for Broadband Wireless Access
Presented By:
Karim M. El Defrawy
ICS
UCI-2005
Outline
What is WiMAX
802.16 Introduction
802.16 MAC Highlights
802.16 Reference Model
MAC Convergence Sub-Layer (CS)
MAC Common Part Sub-Layer (CPS)
MAC Privacy Sub-Layer (PS)
Questions
What is WiMAX?
Worldwide Interoperability for Microwave Access (WiMAX) is the common name associated to the IEEE 802.16a/REVd/e

standards.

These standards are issued by the IEEE 802.16 subgroup that originally covered the Wireless Local Loop technol ....etc

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ABSTRACT

As the virtual centre of excellence in mobile and personal communications (Mobile VCE) moves into its second core research programme it has been decided to set up a fourth generation (4G) visions group aimed at harmonising the research work across the work areas and amongst the numerous researchers working on the programme. This paper outlines the initial work of the group and provides a start to what will become an evolving vision of 4G. A short history of previous generations of mobile communications systems and a discussion of t ....etc

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Resource Allocation in OFDMA Wireless Communications Systems Supporting Multimedia Services



Abstract:
We design a resource allocation algorithm for downlink of orthogonal frequency division multiple access (OFDMA) systems supporting real-time (RT) and best-effort (BE) services simultaneously over a time-varying wireless channel. The proposed algorithm aims at maximizing system throughput while satisfying quality of service (QOS) requirements of the RT and BE service ....etc

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Abstract:
Orthogonal Frequency-Division Multiple Access (OFDMA) is a multi-user version. Multiple access is achieved in OFDMA by assigning subsets of subcarriers to individual users. This allows simultaneous low data rate transmission from several users, OFDM is sometimes referred to as discrete multi-tone modulation, instead of a single carrier being modulated, a large number of evenly spaced subcarriers are modulated using some m-ary of QAM. This is a spread-spectrum technique that increases the efficiency of data communications by increasin ....etc

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CODE DIVISION DUPLEXING

Abstract

Reducing interference in a cellular system is the most effective approach to increasing radio capacity and transmission data rate in the wireless environment. Therefore, reducing interference is a difficult and important challenge in wireless communications. In every two-way communication system it is necessary to use separate channels to transmit information in each direction. This is called duplexing. Currently there exist only two duplexing technologies in wireless communications, Frequency division dup ....etc

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please send me seminar report on 4g technology ....etc

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Orthogonal Frequency Division Multiple Access (OFDMA) is a multiple access scheme for OFDM systems. It works by assigning a subset of subcarriers to individual users.




OFDMA features

*

OFDMA is the 'multi-user' version of OFDM
*

Functions by partitioning the resources in the time-frequency space, by assigning units along the OFDM signal index and OFDM sub-carrier index
*

Each OFDMA user transmits symbols using sub-carriers that remain orthogonal to those of other users
*

More th ....etc

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Hai Sir/Madam,
I need a matlab code for a ofdma femtocell networks with 9 femtocells for power minimaization.

Refer the IEEE paper : Power minimization based resource allocation for interference mitigation in ofdma femtocell networks
....etc

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Orthogonal Frequency Division Multiple Access (OFDMA) is a multiple access scheme for OFDM systems. It works by assigning a subset of subcarriers to individual users.




OFDMA features

*

OFDMA is the 'multi-user' version of OFDM
*

Functions by partitioning the resources in the time-frequency space, by assigning units along the OFDM signal index and OFDM sub-carrier index
*

Each OFDMA user transmits symbols using sub-carriers that remain orthogonal to those of other users
*

More th ....etc

[:=Read Full Message Here=:]

RESOURCE ALLOCATION IN OFDMA WIRELESS COMMUNICATIONS SYSTEMS SUPPORTING MULTIMEDIA SERVICES- NETWORKING

We design a resource allocation algorithm for down-link of orthogonal frequency division multiple access (OFDMA) systems supporting real-time (RT) and best-effort (BE) services simultaneously over a time-varying wireless channel. The proposed algorithm aims at maximizing system throughput while satisfying quality of service (QoS) requirements of the RT and BE services. We take two kinds of QoS requirements into account. One is the require ....etc

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FIXED AND MOBILE WIMAX

ABSTRACT
Within the last two decades, communication advances have reshaped the way we live our daily lives. Wireless communications has grown from an obscure, unknown service to an ubiquitous technology that serves almost half of the people on Earth. Whether we know it or not, computers now play a dominant role in our daily activities, and the Internet has completely reoriented the way people work, communicate, play, and learn. However severe the changes i ....etc

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IMPLEMENTATION OF PRECODING FOR SC-FDMA SYSTEMS
Presented by
VISHNUPRIYA L
M3 MTV,
CET ,TRIVANDRUM



CONTENTS
INTRODUCTION
MOTIVATION
LITERATURE REVIEW
BLOCK DIAGRAM
WORK DONE
FUTURE WORKS

ABSTRACT
Single Carrier Frequency Division Multiple Access (SC-FDMA) is a technique for high data rate uplink transmission in cellular technology. It satisfies the demand of requiring higher data rate. This requirement of high data rate results in sig ....etc

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