Passband

EE 370-3 (082) Chapter IV: Amplitude Mod. Lecture 7 © Dr. Wajih Abu-Al-Saud Baseband vs. Passband conference 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 infection system sends the information subscribe as it is with step up modulation (without oftenness shifting) while passband transmitting shifts the luff to be familial in oftenness to a high frequency and then transmits it, where at the receiver the suggest is shifted linchpin to its original frequency. Almost tout ensemble sources of information receive baseband signboards. Baseband signals be those that have frequencies relatively plastered to zero such(prenominal) as the human voice (20 Hz 5 kHz) and the pictorial matter signal from a TV tv camera (0 Hz 5.5 MHz). A plot of an sound signal and its f requency 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 foreshadow is local (from your home to your neighbors home).

However, when the telephone war cry is a longdistance call that is transmitted via atomise 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 tran smitting that video signal via satellites pa! ssband transmission. Therefore, baseband transmission, which is easier than passband transmission, is usually used when communicating oer wires, while all 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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