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Title: Investigation of peak to average power ratio reduction in OFDM systems
Researcher: Vimal, S P
Guide(s): Shankar Kumar, K R
Keywords: Fourth generation
Information and communication engineering
Orthogonal frequency division multiplexing
Peak to average power ratio
Selective mapping
Wireless communications
Upload Date: 12-Sep-2014
University: Anna University
Completed Date: 01/10/2013
Abstract: Wireless communications have been developed widely and rapidly in the modern world especially during the last decade The need to achieve reliable wireless systems with high spectral efficiency low complexity and good error performance results in continued research of this field However Orthogonal Frequency Division Multiplexing technology is one of the most attractive techniques for achieving high data rates in Fourth newlineGeneration wireless communication The OFDM concept is based on spreading the data to be transmitted over a large number of carriers each being modulated at a low symbol rate The carriers are made orthogonal to each other by appropriately choosing the frequency spacing between them OFDM system effectively combats the multipath fading channel and improves the bandwidth efficiency At the same time it also increases system newlinecapacity so as to provide a reliable transmission The main drawback of OFDM system is high Peak to Average Power Ratio which results in many restrictions for practical applications These large peaks cause saturation in power amplifiers leading to inter modulation among the subcarriers and disturbing out of band energy Therefore the high peak signals are reduced before the transmission is carried out newline
Pagination: xxiv, 176p.
Appears in Departments:Faculty of Information and Communication Engineering

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02_certificates.pdf6.7 MBAdobe PDFView/Open
03_abstract.pdf10.7 kBAdobe PDFView/Open
04_acknowledgement.pdf6.1 kBAdobe PDFView/Open
05_contents.pdf36.03 kBAdobe PDFView/Open
06_chapter1.pdf323.01 kBAdobe PDFView/Open
07_chapter2.pdf62.39 kBAdobe PDFView/Open
08_chapter3.pdf1.23 MBAdobe PDFView/Open
09_chapter4.pdf196.92 kBAdobe PDFView/Open
10_chapter5.pdf400.79 kBAdobe PDFView/Open
11_chapter6.pdf234.31 kBAdobe PDFView/Open
12_chapter7.pdf7.46 kBAdobe PDFView/Open
13_references.pdf40.34 kBAdobe PDFView/Open
14_publications.pdf6.47 kBAdobe PDFView/Open
15_vitae.pdf5.3 kBAdobe PDFView/Open

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