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Definition of "FDD" |
Frequency-division duplex / Floppy Disk Drive, Frequency-division duplex, / Frequency division duplex requires two separate communications channels. In networking, there are two cables. Full-duplex Ethernet uses two twisted pairs inside the CAT5 cable for simultaneous send and receive operations. / Frequency Division Duplex is a technique where separate frequency bands are used at the transmitter and receiver side. Because the FDD technique uses different frequency bands for send and receive operations, the sending and receiving data signals don't interfere with each other. This makes FDD a better choice than Time Division Duplex for symmetric traffic such as voice applications in broadband wireless networks. / Frequency modulation is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. Compare with amplitude modulation, in which the amplitude of the carrier wave varies, while the frequency remains constant. / See frequency division duplex. |
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