Comparative Study between the Discrete-Frequency Kalman Filtering and the Discrete-Time Kalman Filtering with Application in Noise Reduction in Speech Signals. - Leandro Aureliano da Silva; Gilberto Arantes Carrijo; Eduardo Silva Vasconcelos; Roberto Duarte Campos; Cleiton Silvano Goulart; Rodrigo Pinto Lemos (J. Electr. Comput. Eng., 2018)