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All Journal Indonesian Journal of Engineering and Technology (INAJET) Indonesian Applied Physics Letters
Farhan, Mhnd
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Coded Orthogonal Frequency Division Multiplexing System : An Overview Farhan, Mhnd
Indonesian Applied Physics Letters Vol. 5 No. 1 (2024): Volume 5 No. 1 – June 2024
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v4i2.49248

Abstract

This article compares the performance of two modulation techniques”quadrature phase shift keying (QPSK) and M-ary quadrature amplitude modulation (M-QAM) with M=8, 16, 32, and 64”in a coded orthogonal frequency division multiplexing system. As an error-correcting code, convolutional technology is employed. A vehicular channel with additive white gaussian noise (AWGN) is utilized for communication. According to simulation data, for QPSK and M-QAM, a coded orthogonal frequency division multiplexing system performs better than an uncoded one. Additionally, the system performs better with QPSK than it does with M-QAM. Additionally, when M rises, the performance declines.
COFDM System: Overview Farhan, Mhnd
Indonesian Journal of Engineering and Technology (INAJET) Vol. 6 No. 1 (2023): September 2023
Publisher : Fakultas Teknik Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/inajet.v6n1.p34-38

Abstract

This article compares the performance of two modulation techniques—quadrature phase shift keying (QPSK) and quadrature M-ARY AMPLITUDE MODULATION (M-QAM) with M=8, 16, 32, and 64 in a coded orthogonal frequency division multiplexing system. As an error correction code, convolutional technology is used. Vehicle channels with white gaussian noise (AWGN) additives are used for communication. According to simulation data, for QPSK and M-QAM, coded orthogonal frequency division multiplexing systems perform better than uncoded ones. In addition, the system performs better with QPSK than with M-QAM. In addition, when M rises, performance decreases. Keywords: COFDM, M-QAM, QPSK, AWGN
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