IIUM Repository (IREP)

Performance analysis of an optimal circular 16-QAM for Wavelet Based OFDM Systems

Abdullah, Khaizuran and Mahmoud, Seedahmed and Hussain, Zahir (2009) Performance analysis of an optimal circular 16-QAM for Wavelet Based OFDM Systems. International Journal of Communications, Network and System Sciences, 2 (9). pp. 836-844. ISSN 1913-3715

[img] PDF (full paper) - Published Version
Restricted to Registered users only

Download (2MB) | Request a copy

Abstract

The BER performance for an optimal circular 16-QAM constellation is theoretically derived and applied in wavelet based OFDM system in additive white Gaussian noise channel. Signal point constellations have been discussed in much literature. An optimal circular 16-QAM is developed. The calculation of the BER is based on the four types of the decision boundaries. Each decision boundary is determined based on the space dis-tance d following the pdf Gaussian distribution with respect to the in-phase and quadrature components nI and nQ with the assumption that they are statistically independent to each other. The BER analysis for other circular M-ary QAM is also analyzed. The system is then applied to wavelet based OFDM. The wavelet transform is considered because it offers a better spectral containment feature compared to conventional OFDM using Fourier transform. The circular schemes are slightly better than the square schemes in most SNR values. All simulation results have met the theoretical calculations. When applying to wavelet based OFDM, the circular modulation scheme has also performed slightly less errors as compared to the square modulation scheme.

Item Type: Article (Journal)
Additional Information: 3407/119
Uncontrolled Keywords: Performance OFDM, Fourier-Based OFDM, Wavelet-Based OFDM, Circular 16-QAM Square 16-QAM
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering
Depositing User: Dr Khaizuran Abdullah
Date Deposited: 27 May 2011 11:53
Last Modified: 21 Nov 2017 15:54
URI: http://irep.iium.edu.my/id/eprint/119

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year