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 dickens groups depending on the prescribe of frequencies they use to transmit information. These communication systems be classified into BASEBAND or PASSBAND system. Baseband transmitting system sends the information strain forth as it is with out(a) modulation (without oftenness shifting) while passband infection shifts the sharpenize to be familial in oftenness to a higher(prenominal) frequency and then transmits it, where at the receiver the presage is shifted tail to its original frequency. Almost tout ensemble sources of information generate baseband signals. Baseband signals are those that have frequencies relatively plastered to zero such(prenominal) as the human voice (20 Hz 5 kHz) and the portrayal signal from a TV tv camera (0 Hz 5.5 MHz). A plot of an audio frequen cy 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 apply for homes and offices, for example, may transmit the baseband audio signal as it is when the bid is local (from your home to your neighbors home). However, when the telephone call is a longdistance call that is transmitted via atom-bomb 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 while transmitting that video signal via satellites passband transmission. Therefore, baseband transmission, which is easier than passband transmission, is usually used when communicating oer wires, while everywheretheair transmission requires passband transmission. Notice that even over wires, t he 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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