Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems

Orthogonal Frequency-Division Multiplexing (OFDM) is an important technology that enables transmission at high data rates. However, a major problem of OFDM systems is the high peak-to-average power ratio (PAPR) of OFDM signals. High PAPR drives the transmitter power amplifier (PA) into saturation, a...

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Format:	Thesis
Language:	English
Subjects:	Orthogonal frequency division multiplexing Digital modulation Wireless LANs Wireless communication systems
Online Access:	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/4/Zeyid%20Tariq.pdf
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spelling	my-unimap-779662023-03-03T07:41:10Z Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems Md. Mijanur, Rahman, Dr. Orthogonal Frequency-Division Multiplexing (OFDM) is an important technology that enables transmission at high data rates. However, a major problem of OFDM systems is the high peak-to-average power ratio (PAPR) of OFDM signals. High PAPR drives the transmitter power amplifier (PA) into saturation, and causes nonlinear distortions. In order to improve the performance of the OFDM systems, PAPR should be significantly reduced at low computational complexities. Motivated by the requirement of efficient PAPR reduction techniques associated with multi-carrier systems, such as OFDM, this research explores the state-of-the-art PAPR reduction techniques and proposes new signal processing techniques that can achieve a minimum PAPR at lower computational complexities for given system parameters that are compatible with the appropriate standards. This thesis proposes a novel flexible and practical scheme for PAPR reduction, based on partial transmit sequence (PTS) technique, which is a well known probabilistic approach to the PAPR problem. This approach decreases the PAPR without any significant performance loss, adverse impact, or changes to the system. The proposed approach eliminates the known drawback of current PTS techniques, namely the high implementation complexity to achieve a significant PAPR reduction. In this thesis, three methods have been proposed to realize minimal PAPR with low computational complexity in an OFDM system. These approaches enhance both partitioning and phase rotation schemes within the PTS framework in order to minimize PAPR at lower computational complexities. The performances of the approaches were evaluated via computation of PAPR achieving these approaches and comparing them with the PAPR realized by traditional PTS schemes. The following are the principal contributions of this thesis. First, a new PTS partitioning method, namely the Blocked Interleaved Partitioning (BIP), which leads to better PAPR reduction performance, is proposed. Second, the Smallest Correlation Phase Vector (SCPV) and Blocked Random Phase Selection (BRPS) are proposed to determination the optimal phase rotations. Combination of proposed partitioning and phase rotation schemes resulted in two proposed PAPR reduction schemes namely BIPSC-PTS and BIPBR-PTS respectively. Universiti Malaysia Perlis (UniMAP) Thesis en http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77966 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/3/license.txt 8a4605be74aa9ea9d79846c1fba20a33 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/1/Page%201-24.pdf e2f2c61f48d0f7fabd66197586e03d43 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/2/Full%20text.pdf 1edc9dfc3901d5b0e9f36d9b97beaf89 http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/4/Zeyid%20Tariq.pdf ce74a1c59a4bb5d0372c31814c7016ca Universiti Malaysia Perlis (UniMAP) Orthogonal frequency division multiplexing Digital modulation Wireless LANs Wireless communication systems School of Computer and Communication Engineering
institution	Universiti Malaysia Perlis
collection	UniMAP Institutional Repository
language	English
advisor	Md. Mijanur, Rahman, Dr.
topic	Orthogonal frequency division multiplexing Digital modulation Wireless LANs Wireless communication systems
spellingShingle	Orthogonal frequency division multiplexing Digital modulation Wireless LANs Wireless communication systems Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems
description	Orthogonal Frequency-Division Multiplexing (OFDM) is an important technology that enables transmission at high data rates. However, a major problem of OFDM systems is the high peak-to-average power ratio (PAPR) of OFDM signals. High PAPR drives the transmitter power amplifier (PA) into saturation, and causes nonlinear distortions. In order to improve the performance of the OFDM systems, PAPR should be significantly reduced at low computational complexities. Motivated by the requirement of efficient PAPR reduction techniques associated with multi-carrier systems, such as OFDM, this research explores the state-of-the-art PAPR reduction techniques and proposes new signal processing techniques that can achieve a minimum PAPR at lower computational complexities for given system parameters that are compatible with the appropriate standards. This thesis proposes a novel flexible and practical scheme for PAPR reduction, based on partial transmit sequence (PTS) technique, which is a well known probabilistic approach to the PAPR problem. This approach decreases the PAPR without any significant performance loss, adverse impact, or changes to the system. The proposed approach eliminates the known drawback of current PTS techniques, namely the high implementation complexity to achieve a significant PAPR reduction. In this thesis, three methods have been proposed to realize minimal PAPR with low computational complexity in an OFDM system. These approaches enhance both partitioning and phase rotation schemes within the PTS framework in order to minimize PAPR at lower computational complexities. The performances of the approaches were evaluated via computation of PAPR achieving these approaches and comparing them with the PAPR realized by traditional PTS schemes. The following are the principal contributions of this thesis. First, a new PTS partitioning method, namely the Blocked Interleaved Partitioning (BIP), which leads to better PAPR reduction performance, is proposed. Second, the Smallest Correlation Phase Vector (SCPV) and Blocked Random Phase Selection (BRPS) are proposed to determination the optimal phase rotations. Combination of proposed partitioning and phase rotation schemes resulted in two proposed PAPR reduction schemes namely BIPSC-PTS and BIPBR-PTS respectively.
format	Thesis
title	Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems
title_short	Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems
title_full	Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems
title_fullStr	Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems
title_full_unstemmed	Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems
title_sort	enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems
granting_institution	Universiti Malaysia Perlis (UniMAP)
granting_department	School of Computer and Communication Engineering
url	http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77966/4/Zeyid%20Tariq.pdf
_version_	1776104255250235392

Enhanced partial transmit sequence technique with improved partitioning and phase factor methods for orthogonal frequency division multiplexing systems

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