An optimal circular 16-QAM modulation technique for wavelet and fourier based OFDM

Abstract—A new approach of an optimal 16-QAM modulation has been introduced to be used for both Fourier and wavelet based OFDM. The comparison between circular and square 16- QAM is included. It is shown that the power consumption of circular is better than the square by 0.5359 W or -2.71 dB for...

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Bibliographic Details
Main Authors: Abdullah, Khaizuran, Ismail, Ahmad Fadzil, Hashim, Wahidah, Hussain, Zahir
Format: Conference or Workshop Item
Language:English
Published: 2010
Subjects:
Online Access:http://irep.iium.edu.my/10311/1/ismail%2C_a_fadzil_-_optimal.pdf
http://irep.iium.edu.my/10311/
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5556821
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Institution: Universiti Islam Antarabangsa Malaysia
Language: English
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Summary:Abstract—A new approach of an optimal 16-QAM modulation has been introduced to be used for both Fourier and wavelet based OFDM. The comparison between circular and square 16- QAM is included. It is shown that the power consumption of circular is better than the square by 0.5359 W or -2.71 dB for the same minimum distance 2d. Simulation works for Fourier and wavelet based OFDM have been performed. In Fourier base OFDM, the circular has slightly out-performed the square when the number of subcarriers is varied from 32 to 256 at different BER values. When considering wavelet based OFDM, all wavelet families except Biorthogonal and Reverse-Biorthogonal have performed similar result for both modulation schemes. Of all Biorthogonal families, bior5.5 is the most out-performed one when using circular and square 16-QAM respectively.