carrier difference system

См. также в других словарях:

• 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

• Difference in the Depth of Modulation — or DDM is a method used by the Instrument Landing System in conjunction with the associated airborne receiving equipment to define a position in airspace. [ [http://stinet.dtic.mil/oai/oai?verb=getRecord metadataPrefix=html identifier=ADA138301… …   Wikipedia

• Difference in the depth of modulation — The difference in the depth of modulation or DDM is used by instrument landing systems in conjunction with the associated airborne receiving equipment to define a position in airspace.[1] DDM is usually expressed in percentage but may also be… …   Wikipedia

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