Volume 1 Number 3 (Sep. 2012)
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IJCCE 2012 Vol.1(3): 273-276 ISSN: 2010-3743
DOI: 10.7763/IJCCE.2012.V1.70

Comparative Analysis of OFDM Sub-Carrier Modulation Using QPSK and π/4-QPSK

Babatunde Ogunleye, Lawrence Oborkhale, and Olusegun Ogundapo

Abstract—Orthogonal Frequency Division Multiplexing(OFDM) has become the most widely used signal carrier platform for many wireless transmission technologies. Since OFDM uses multiple sub-carriers in transmitting its signals with each sub-carrier mostly modulated using phase modulation, choosing the best phase modulation scheme is paramount to its optimal performance. Quadrature Phase Shift Keying (QPSK) is popularly used for OFDM sub-carrier modulation and it has proven to be quite stable and reliable. This paper compares OFDM’s performance using QPSK alongside one of its variant, π/4-QPSK, especially when passed through a noisy channel, which is simulated using MATLAB’s Additive white Gaussian noise (AWGN) channel.

Index Terms—OFDM, QPSK, π/4-QPSK, etc.

The authors are with the School of Information Technology and Communication, American University of Nigeria, PMB 2250, Yola,Adamawa State, Nigeria (e-mail: babatunde.ogunleye@aun.edu.ng,ogunleye.babs@gmail.com).

Cite: Babatunde Ogunleye, Lawrence Oborkhale, and Olusegun Ogundapo, "Comparative Analysis of OFDM Sub-Carrier Modulation Using QPSK and π/4-QPSK," International Journal of Computer and Communication Engineering vol. 1, no. 3, pp. 273-276 , 2012.

General Information

ISSN: 2010-3743
Frequency: Quarterly
Editor-in-Chief: Dr. Maode Ma
Abstracting/ Indexing: EI (INSPEC, IET), Google Scholar, Crossref, Engineering & Technology Digital Library, ProQuest, and Electronic Journals Library
E-mail: ijcce@iap.org
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