Passband

EE 370-3 (082) Chapter IV: Amplitude Mod. Lecture 7 © Dr. Wajih Abu-Al-Saud Baseband vs. Passband dialogue 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 argon classified into BASEBAND or PASSBAND system. Baseband transmittal system sends the information arouse as it is with out modulation (without oftenness shifting) while passband transmittal shifts the augury to be familial in oftenness to a high frequency and then transmits it, where at the receiver the point is shifted plunk for to its original frequency. Almost tout ensemble sources of information draw baseband augurys. Baseband signals ar those that have frequencies relatively plastered to zero much(prenominal) as the human voice (20 Hz 5 kHz) and the moving picture signal from a TV tv camera (0 Hz 5.5 MHz). A plot of an audio frequency signal and its freq uency 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 predict is local (from your home to your neighbors home).

However, when the telephone blackguard is a longdistance call that is transmitted via zap 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 transmitt ing that video signal via satellites passban! d transmission. Therefore, baseband transmission, which is easier than passband transmission, is usually used when communicating oer wires, while everyplacetheair 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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