Karapenev, B. “Synthesis and Studies of Digital Frequency Modulator-Demodulator With Non-Coherent Demodulator Containing a Band-Pass Active Filter”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 10, no. 4 (October 31, 2018): 65–73. Accessed December 22, 2024. https://jtec.utem.edu.my/jtec/article/view/4728.