BER Comparison of OFDM with M-QAM Modulation Scheme of AWGN and Rayleigh Fading Channels

Ali Farzamnia, Ngu War Hlaing, Muralindran Mariappan, Manas Kumar Haldar

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

22 Citations (Scopus)


The wireless channel environment is critical to develop wireless communication. In Quadrature Amplitude Modulation (QAM), the constellation points are in square grid with equal vertical and horizontal spacing. Because of higher order modulation formats, more bit per symbol can be transmitted. M-QAM is the efficient digital modulation method because of its higher constellation points. In this paper, the Bit Error Rate (BER) performance of Orthogonal Frequency Division Multiplexing (OFDM) systems and different arrays of QAM (4, 8, 16, and 64-QAM) modulation techniques has been compared under the Rayleigh fading and Additive White Gaussian Noise (AWGN) channels. All the simulations are carried out in MATLAB. The investigation results shows that the Quadrature Phase Shift Keying (QPSK) modulation scheme gives the best performance in term of BER in OFDM system compared to the M-QAM modulation scheme.

Original languageEnglish
Title of host publication2018 9th IEEE Control and System Graduate Research Colloquium, ICSGRC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages5
ISBN (Electronic)9781538663219, 9781538663202
ISBN (Print)9781538663226
Publication statusPublished - 4 Mar 2019
Externally publishedYes
Event9th IEEE Control and System Graduate Research Colloquium - Shah Alam, Malaysia
Duration: 3 Aug 20184 Aug 2018
Conference number: 9


Conference9th IEEE Control and System Graduate Research Colloquium
Abbreviated titleICSGRC 2018
CityShah Alam

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