Topic: Phase Modulation
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What is phase modulation?
Answer Phase modultion is one of the three ways of modulating or altering a signal so that it is able to carry information. The other two are amplitude and frequency modulation. Phase modulation is used in high speed modems. Read More »
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What is phase reversal modulation?
( ′fāz ri′vər·səl ′mäj·ə′lā·shən ) (communications) Form of pulse modulation in which reversal of signal phase serves to distinguish between the two binary states used in data transmission. Read More »
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What is phase modulator?
( ′fāz ′mäj·ə′lād·ər ) (electronics) An electronic circuit that causes the phase angle of a modulated wave to vary (with respect to an unmodulated carrier) in accordance with a modulating signal. Read More »
Source: http://www.answers.com/topic/phase-modulator
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Phase Modulation
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Advantage - 1. Phase modulation & demodulation is easy compared to Frequency modulation. 2. Phase modulator is used in determining velocity of moving target by extracting Doppler information. Doppler information needs stable carrier which i...
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Source: http://wiki.answers.com/Q/What_are_the_advantages_and_disadvantag...
( ¦self ′fāz ′mäj·ə′lā·shən ) (optics) The temporal action of a medium whose index of refraction increases with increasing optical intensity on time-varying optical signals or pulses, whereby the rising front edge of the pulse is shifted to...
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Source: http://www.answers.com/topic/self-phase-modulation
( ′fāz ′mäj·ə′lā·shən di′tek·tər ) (electronics) A device which recovers or detects the modulating signal from a phase-modulated carrier.
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Source: http://www.answers.com/topic/phase-modulation-detector
The difference between frequency modulation and phase modulation is that with frequency modulation the angular frequency of the signal is modified while with the phase modulation, the phase angle of the signal is modified.
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Source: http://wiki.answers.com/Q/What_is_the_difference_between_frequenc...
modulation:- the characteristic varying in Carrier signal,according to the message signal if amplitude is changing then amplitude modulation
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