In telecommunications, a carrier wave or carrier is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information. This carrier wave is usually a much higher frequency than the input signal. The purpose of the carrier is usually either to transmit the information through space as an electromagnetic wave (as in radio communication), or to allow several carriers at different frequencies to share a common physical transmission medium by frequency division multiplexing (as, for example, a cable television system).
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Some articles on carrier wave:
... digital data as variations in the amplitude of a carrier wave ... Frequency and phase of the carrier are kept constant ... form of ASK operates as a switch, using the presence of a carrier wave to indicate a binary one and its absence to indicate a binary zero ...
... action Capillary length Capillary number Capillary pressure Capillary surface Capillary wave Capture orbit Carbon-13 NMR Carbon-burning process Carbon (journal ... Van Vliet Carreau fluid Carrier-to-noise ratio Carrier-to-receiver noise density Carrier generation and recombination Carroll's paradox Carroll Alley Cartan formalism (physics ... Cluster (physics) Cluster decay Cluster decomposition theorem Clyde Cowan Clyde Wiegand Cnoidal wave Coandă effect Coaxial rotors Cobra probe Cockcroft Institute ...
... current can radiate off a conductor (the antenna) as electromagnetic waves (radio waves) ... or video signal, onto the radio frequency current to be carried by the radio waves ... they strike the antenna of a radio receiver, the waves excite similar (but less powerful) radio frequency currents in it ...
... Carrier leakage is interference caused by cross-talk or a DC offset ... It is present as an unmodulated sine wave within the signal's bandwidth, whose amplitude is independent of the signal's amplitude ... See frequency mixers, to read further about carrier leakage or local oscillator feedthrough ...
Famous quotes containing the words wave and/or carrier:
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