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Improved Harmony Search Optimization for Hybrid Clipping-PTS PAPR Reduction in FBMC System

The authors of this article focus on solving the PAPR problem of FBMC System using improved harmony search optimization methods adopting the hybrid clipping partial transmit sequence concept

Published onMay 31, 2023
Improved Harmony Search Optimization for Hybrid Clipping-PTS PAPR Reduction in FBMC System


The filter bank multicarrier (FBMC) with offset quadrature amplitude modulation (OQAM) is studied by researchers as a key enabler for 5th-generation air interface. Some critical disadvantages which are associated with the FBMC/OQAM system are self-interference, high complexity and high peak to average power ratio (PAPR). This paper concentrates on solving the problem of PAPR which faces the FBMC/OQAM system. Firstly, Harmony Search(HS) optimization is applied to partial transmit sequence (PTS) and Clipping(C) methods to provide the optimal clipping level and optimal phase factor sets and hence a significant PAPR reduction can be achieved. Secondly, using HS optimization of hybrid (PTS) with clipping (HS-hybrid-CPTS) which is used for the PAPR reduction in FBMC/OQAM system. Finally, introducing the enhanced HS (EHS) optimization with few parameters by adjusting the pitch adjustment rate (PAR) and bandwidth of adjustment to be updated dynamically for the hybrid scheme. The enhanced HS optimization improves the convergence and accuracy of the proposed methods to produce lower PAPR. Simulation results show that the efficiency of (EHS) optimization of the hybrid methods between clipping and PTS (EHS hybrid C-PTS) provides better performance of reducing PAPR than that of hybrid clipping PTS (HS hybrid C-PTS) by a percentage of 14%-24%, and better than the two traditional methods by a percentage of 47%-62%. The bit error rate (BER) performance and power spectral density (PSD) of the proposed methods are calculated.

Keywords: FBMC/ OQAM; EHS hybrid C-PTS; PAPR; CCDF; BER.


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Authors Biography

Mohamed Hussein

He received the B.S. with an honor's degree in the department of Electronics and Communication, Faculty of Engineering, Misr University for science and technology, Giza, Egypt, in 2009. Mohamed joined Misr University for science and technology (MUST) in the department of Electronics and Communication Engineering in 2009 as a demonstrator. He received M.Sc. degree from Arab Academy For science and technology and maritime (AASTMT) in 2013. He did his M.Sc. in PAPR problem solved in the LTE system. Also, he received Ph.D. degrees from the Ain shams university, Electronics and communication engineering in 2019. His research interests include design and analysis of the Physical layer in all 5G waveform candidates and its application in the wireless communication system.Mohamad has received a six-month scholarship from the Erasmus+ for his Ph.D. in Lucian Blaga Sibiu, Romania. Mohamad has been served as a reviewer for many IEEE conferences, and IEEE transactions on Communications and IEEE Journal in selected areas in Communication (JSAC).

Mamdouh Gouda

He received the B.Sc. degree in electrical engineering from the Military Technical College, Cairo Egypt in 1981. He received the M.Sc. degree in electrical engineering from the Military Technical College, Cairo, Egypt in 1985. He received the Ph.D. degree in electrical engineering from the UK in 1998. Currently, he is an Assoc. Professor at Misr University for Science and Technology.

Hadia M. El Hennawy

She received her B.Sc. and M.Sc. degrees from the Ain Shams University, Cairo, Egypt, in 1972 and 1976, respectively, and the Ph.D. degree from the Technische Uni- versitat Braunschweig, Germany, in 1982. In 1982, she returned to Egypt and joined the Electronics and Communications Engineering Department, Ain Shams University, as an Assistant Professor. She was nominated as an Associate Professor in 1987 and then a Professor in 1992. In 2004, she was appointed as the Vice-Dean for graduate studies and research. In 2005, she was appointed as the Dean of the Faculty of Engineering, Ain Shams University. She has focused her research on microwave circuit design, antennas, microwave communication, and recently wireless communication. She has been the Head of the Microwave Research Laboratory since 1982. She has published more than 100 journal and conference papers and supervised over 50 Ph.D. and M.Sc. students. Professor El Hennawy was the Editor-in-Chief of the Scientific Bulletin of the Faculty of Engineering, Ain Shams University, from August 2004 to August 2005 and is a member of the Industrial Communication Committee in the National Telecommunication Regulatory Authority (NTRA), Educational Engineering Committee in the Ministry of Higher Education, and Space Technology Committee in the Academy of Scientific Research.

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