Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2009.1159.1164MaghrebiS.G.LotfizadM.GhanbariM.6200996In this study, a new constellation, the Non-Rectangular
Quadrature Amplitude Modulation (NQAM) instead of Quadrature Amplitude
Modulation (QAM) in the Discrete Multi-Tone (DMT) system is presented
that has better performances. These constellations, with the same average
power, have been applied to six standard channels (CSA No. 1 through CSA
No. 6). The AWGN and burst noise are applied to these channels separately.
Based on the simulation results, the NQAM constellation has a better performance,
in terms of the Bit Error Rate (BER), with respect to the conventional
QAM constellation, especially for high SNRs, without any increase in the
computational complexity.]]>Acker, K.V., G. Leus, M. Moonen and T. Pollet,2001Bahai, A.R.S. and B.R. Saltzberg,2002Ghazi-Maghrebi, S., M. Lotfizad and M. Ghanbari,2007Golden, P., H. Dedieu and K. Jacobsen,2006Kim, J. and Y. Lee,2007Panigrahi, S., Y. Xu and T. Le-Ngoc,2006Starr, T., M. Sorbara, J.M. Cioffi and P.J. Silverman,2003Twardowski, T.,2006Vanbleu, K., M. Moonen and G. Leus, 2006Xiong, F.,2000Wu, C.H. and S.J. Chern,2007Wyglinski, A.M., F. Labeau and P. Kabal,2008Zhu, L.P., X. Zhong, Y. Yao, S.W. Dong and X.Z. Cui,2007