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phase-modulated carrier

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См. также в других словарях:

  • Carrier frequency — is a term used to designate: * The nominal frequency of a carrier wave * The center frequency of a frequency modulation signal * The frequency of the unmodulated electrical wave at the output of an amplitude modulated (AM), frequency modulated… …   Wikipedia

  • Phase noise — is the frequency domain representation of rapid, short term, random fluctuations in the phase of a wave, caused by time domain instabilities ( jitter ). Generally speaking radio frequency engineers speak of the phase noise of an oscillator,… …   Wikipedia

  • Phase modulation — (PM) is a form of modulation that represents information as variations in the instantaneous phase of a carrier wave.Unlike its more popular counterpart, frequency modulation (FM), PM is not very widely used. This is because it tends to require… …   Wikipedia

  • modulated — adj. (Electronics) 1. Having either amplitude, intensity, frequency, or phase altered at intervals to represent information to be transmitted; of the carrier wave of a radio signal transmitted from one device to another for the purpose of… …   The Collaborative International Dictionary of English

  • carrier — [kar′ē ər] n. [ME carier < carien, CARRY] 1. a person or thing that carries, as one who delivers mail or newspapers, or a train, bus, airplane, etc. 2. a) a person or company in the business of transporting goods or passengers b) a company in… …   English World dictionary

  • phase modulation — phase′ modula tion n. elo elo radio transmission in which the carrier wave is modulated by changing its phase to transmit the amplitude and pitch of the signal • Etymology: 1925–30 …   From formal English to slang

  • Phase-shift keying — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

  • Carrier recovery — A carrier recovery system is a circuit used to estimate and compensate for frequency and phase differences between a received signal s carrier wave and the receiver s local oscillator for the purpose of coherent demodulation. Example of QPSK… …   Wikipedia

  • Phase-locked loop — PLL redirects here. For other uses, see PLL (disambiguation). A phase locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is related to the phase of an input reference signal. It is an electronic… …   Wikipedia

  • Phase detector — A phase detector is a frequency mixer or analog multiplier circuit that generates a voltage signal which represents the difference in phase between two signal inputs. It is an essential element of the phase locked loop (PLL).Detecting phase… …   Wikipedia

  • carrier — /kar ee euhr/, n. 1. a person or thing that carries. 2. an employee of the post office who carries mail. 3. a person who delivers newspapers, magazines, etc., on a particular route. 4. Transp. a. an individual or company, as a railroad or… …   Universalium

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