| Carrier Wave |
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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, for example voice or data, to be Transmitted . This carrier wave is usually of much higher Frequency than the Baseband modulating Signal (the signal which contains the information). Carrier waves are used when transmitting Radio signals to a radio receiver.
The frequency for a given radio station is actually the carrier wave's Center Frequency . MODERN MODULATION SYSTEMS & THE CARRIER WAVE Newer forms of radio communication, such as Spread Spectrum and Ultra Wide Band , do not transmit a conventional carrier wave, nor does COFDM , which is used in DSL and in the European standard for HDTV .
Definition of carrier waves In Telecommunication , the term carrier ('''cxr''') or '''carrier wave''' has the following meanings: # A Waveform suitable for Modulation by an Information -bearing Signal . # An unmodulated or a uniform or predictable series of pulses. ''Synonym:'' carrier wave. # Sometimes employed as a Synonym for a Carrier System , or a Synonym for a telecommunications provider company (operator), such as a Common Carrier . Source: mostly from Federal Standard 1037C and from MIL-STD-188 REFERENCES SEE ALSO |
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