Preliminary Investigation of Gray Coded M–Quadrature Amplitude Modulation in Orthogonal Frequency Division Multiplexing Over Additive White Gaussian Noise Channel. J. Teknol. [Internet]. 2012 Jan. 20 [cited 2026 Oct. 4];40(1):49–58. Available from: https://journals.utm.my/jurnalteknologi/article/view/415