Generalized discrete fourier transform based minimization of PAPR in OFDM systems

Elshirkasi, Ahmed Mohamed and Siddiqi, Mohammad Umar and Habaebi, Mohamed Hadi (2014) Generalized discrete fourier transform based minimization of PAPR in OFDM systems. In: International Conference on Computer & Communication Engineering 2014, 23-25 Sept. 2014, Gombak, Kuala Lumpur.

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Abstract

Orthogonal frequency division multiplexing OFDM is a preferred technique in digital communication systems due to its benefits of achieving high bit rates and its ability to resist multipath effect over fading channels. However, high peak to average power PAPR ratio of the OFDM transmitted signal is a main drawback in OFDM systems. In this paper, the nonlinear phase from the theory of generalized discrete Fourier transform (GDFT) is used to improve the performance of the partial transmit sequence (PTS) scheme which is one of the techniques used to reduce PAPR. This technique divides the input OFDM block into a number of sub-blocks. IFFT is taken for each sub-block, then the output phase is rotated by coefficients to produces minimum PAPR. Simulation results show that modifying the phase of the OFDM before applying the technique reduces the number of the sub-blocks for the same amount of PAPR reduction.

Item Type:	Conference or Workshop Item (Invited Papers)
Additional Information:	5072/39303
Uncontrolled Keywords:	generalized discrete Fourier transform; OFDM; PAPR; PTS
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering
Depositing User:	Prof. Mohammad Umar Siddiqi
Date Deposited:	02 Dec 2014 09:32
Last Modified:	23 Sep 2017 10:31
URI:	http://irep.iium.edu.my/id/eprint/39303

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