OFDM Channel Estimation Enhancement using Null Subcarriers. Tikrit Journal of Engineering Sciences, [S. l.], v. 25, n. 1, p. 12–17, 2018. DOI: 10.25130/tjes.25.1.03. Disponível em: https://www.tj-es.com/ojs/index.php/tjes/article/view/54.. Acesso em: 10 sep. 2026.