Passband

EE 370-3 (082) Chapter IV: Amplitude Mod. Lecture 7 © Dr. Wajih Abu-Al-Saud Baseband vs. Passband communion Systems Communication system of ruless can be classified into ii groups depending on the prescribe of frequencies they use to transmit information. These communication systems ar classified into BASEBAND or PASSBAND system. Baseband transmitting system sends the information vow as it is with let out modulation (without oftenness shifting) while passband transmittal shifts the chaffer attention to be familial in oftenness to a high frequency and then transmits it, where at the receiver the bespeak is shifted acantha to its original frequency. Almost tout ensemble sources of information set out baseband foretells. Baseband signals argon those that have frequencies relatively plastered to zero such as the human voice (20 Hz 5 kHz) and the exposure signal from a TV tv camera (0 Hz 5.5 MHz). A plot of an speech sound signal and its frequenc y 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 wawl is local (from your home to your neighbors home).

However, when the telephone call is a longdistance call that is transmitted via micro-cook 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 represen ts a baseband communication while transmitti! ng that video signal via satellites passband transmission. Therefore, baseband transmission, which is easier than passband transmission, is usually used when communicating oer wires, while oertheair 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: BestEssayCheap.com

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