Al-Rawi, Muhanned, and Muaayed Al-Rawi. 2012. “Comparison Between Two Algorithms of 32kb/S ADPCM Using QAM Signal at 16.8kb/s”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 4 (2):53-56. https://jtec.utem.edu.my/jtec/article/view/437.