Date of Award

1-1-2012

Document Type

Thesis

Degree Name

M.S.

Department

Electrical Engineering

First Advisor

Mohammed A. Matin

Second Advisor

Vi Narapareddy

Keywords

Multi-Carrier, OFDM, PSK, QAM, Single-Carrier, Wireless

Abstract

The spectacular growth of wireless communication tools has escalated the number of mobile subscribers from almost 700 million in 2000 to more than 4 billion in 2009. The huge number of subscribers has led to several issues with how service is provided. The high user demand has forced developers to overcome the problems of the old analog systems and to introduce OFDM as a promising technique that can fulfill users' high demands. This technique matches well with high data rate connection and provides a higher capacity for the subscribers' usage.

The OFDM, as a multi-carrier, is more complex than the single-carrier transmission scheme. However, the OFDM technique maintains better performance for high data rate in terms of bit error rate (BER). In this thesis a comparison has been presented between the multi-carrier OFDM and the single-carrier to prove, in a simulation form, the theoretical point of view. Despite the advantages of using the OFDM scheme, there are several drawbacks. One of these negatives is the high peak to average power ratio (PAPR).

To overcome this problem, there are power reduction techniques that can be applied to the signal to reduce the high power. One of these techniques is the clipping and filtering technique. A maximum level is sited for the transmitted signal to reduce the power and afterward, the signal goes through a filter to remove the influence of the in-band distortion and out-of-band radiation.

Provenance

Recieved from ProQuest

Rights holder

SALEH M ALBDRAN

File size

102 p.

File format

application/pdf

Language

en

Discipline

Electrical engineering

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