MODULACIONES DE AMPLITUD | 23/37 | UPV

Title: AMPLITUDE MODULATIONS Description: Double-sideband and single-sideband amplitude modulation. Camacho García, A. (2009). AMPLITUDE MODULATIONS. https://riunet.upv.es/handle/10251/4861 Automatic description: In this video, a professor from the communications department of a polytechnic university addresses the topic of amplitude modulations. He begins by explaining the concept and its use with complex exponential carriers, although he acknowledges its limited practical application due to the complexity of the signals used. He then details amplitude modulation using sinusoidal carriers and its effect in the frequency domain, illustrating how the modulating signal shifts in the spectrum around the carrier frequency. Methods for demodulating amplitude signals are also discussed, differentiating between synchronous and asynchronous demodulation. Synchronous demodulation requires a receiver that recovers the original signal by multiplying the modulated signal by a cosine of the same frequency as the carrier, while asynchronous demodulation uses an envelope detector that can be simple, but is less efficient in terms of transmitter power consumption. Finally, the professor mentions the importance of the modulation index and the requirements of the modulating signal for asynchronous demodulation, such as the need for it to always be positive and of a lower frequency than the carrier. He concludes by emphasizing the relevance of understanding both types of demodulation and the modulation index in the field of communications. Author: Andrés Camacho García Course: This video is 34/51 of the course Signal Processing in Communications | Universitat Politècnica de València (UPV).    • Curso Tratamiento de señales en comunicaci...   Course: This video is 23/37 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 #Amplitude Modulation #Synchronous Demodulation #Asynchronous Demodulation #Modulation Index