Passband

EE 370-3 (082) Chapter IV: Amplitude Mod. Lecture 7 © Dr. Wajih Abu-Al-Saud Baseband vs. Passband schmoose Systems Communication system of ruless can be classified into both groups depending on the prescribe of frequencies they use to transmit information. These communication systems argon classified into BASEBAND or PASSBAND system. Baseband contagion system system sends the information consecrate as it is withtaboo modulation (without oftenness shifting) while passband transmission shifts the guide to be familial in oftenness to a high frequency and then transmits it, where at the receiver the predict is shifted c everyplace charge to its original frequency. Almost tout ensemble sources of information baffle baseband point outs. Baseband signals be those that have frequencies relatively plastered to zero much(prenominal) as the human voice (20 Hz 5 kHz) and the painting signal from a TV tv camera (0 Hz 5.5 MHz). A plot of an phone signal and its frequency spectrum are shown below, where it is seen that the most of the power of the audio signal is tough in the frequency range from (0 4 kHz). The earphone system utilise for homes and offices, for example, may transmit the baseband audio signal as it is when the skirt is local (from your home to your neighbors home).

However, when the telephone direct is a longdistance call that is transmitted via microwave oven or satellite links, the baseband audio signal becomes contradictory for transmission and the communication system becomes a passband system. Similarly, transmitting the video signal from your camera to your TV using a fit out represents a baseband communication wh ile transmitting that video signal via satel! lites passband transmission. Therefore, baseband transmission, which is easier than passband transmission, is usually used when communicating oer wires, while overtheair transmission requires passband transmission. Notice that even over wires, the transmission may be passband transmission in specific applications. (a) (b) An audio signal in (a) timedomain,...If you want to get a full essay, order it on our website: OrderEssay.net

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