S. Sadinov, K. Koichev, P. Penchev, and K. Angelov, “Simulation Evaluation of BER Characteristics for M-PSK and M-QAM Modulations used in the Reverse Channel of Cable TV Nets”, ELEKTRON ELEKTROTECH, vol. 95, no. 7, pp. 71–76, Aug. 2009, Accessed: Jan. 23, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/10049