Diezmado e interpolacion | 12/37 | UPV

Title: Decimation and Interpolation Description: Decimation and Interpolation of Discrete Signals Camacho García, A. (2009). Decimation and Interpolation. https://riunet.upv.es/handle/10251/4860 Automatic Description: In this video, a professor from the communications department explains the concept of decimation and interpolation in discrete signals. It begins with the sampling of discrete signals, a process that consists of systematically setting certain samples of a signal to zero, thus affecting its frequency spectrum. The importance of an appropriate sampling pulse to avoid spectral overlap is mentioned, and it is detailed how the recovery of the original signal is possible through low-pass filtering. Next, the distinction between sampling and decimation is made; while sampling sets unwanted samples to zero, decimation eliminates them directly. It is observed that decimating a previously sampled signal does not alter its spectrum, but it does result in a broadened spectrum. It is recommended to filter the signal before decimation to prevent spectral overlap. Finally, interpolation, the inverse process of decimation, is analyzed, where intermediate points are added to a discrete signal. Inserting zeros before filtering is suggested to obtain the interpolated signal. As final considerations, the need for adequate filtering in the sampling, decimation, and interpolation processes is emphasized, as well as adjusting the sampling frequency in analog-to-digital and digital-to-analog converters when decimation or interpolation is involved. Author: Andrés Camacho García Course: This video is 30/51 of the course Signal Processing in Communications | Universitat Politècnica de València (UPV).    • Curso Tratamiento de señales en comunicaci...   Course: This video is 12/37 of the Signals and Communications Theory course.    • Teoría de las señales y las comunicaciones   Universitat Politècnica de València UPV: https://www.upv.es More videos at:    / valenciaupv   Access our MOOCs: https://upvx.es #Fourier transform #Discrete signals #Decimation #Interpolation #Sampling