A modulation scheme of 4 states in 3 dimmensions based on Wavelets (4P-3D). Revista de Investigaciones Universidad del Quindío, [S. l.], v. 25, n. 1, p. 159–168, 2014. DOI: 10.33975/riuq.vol25n1.168. Disponível em: https://revistas.uniquindio.edu.co/ojs/index.php/riuq/article/view/168. Acesso em: 25 jun. 2026.