i dont know ans. of this.
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.
Frequency Modulation and Phase Modulation
angle modulation is called non linear modulation because the information is stored in phase of the carrier signal
both are related because phase is an integral function of frequency
The reason it is called exponential (non-linear) modulation is that the information is encoded within the phase of carrier.
Frequency modulation Phase modulation
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 is possible in phase modulation but not in frequency modulation. Disadvantage - 1. Phase ambiguity comes if we exceed its modulation index pi radian(180 degree). 2. we need frequency multiplier to increase phase modulation index. Visit my website http://harshit.org
Frequency modulation and Phase modulation
I could certainly be wrong, but my recollection is that a phase locked loopis a universal detector for Frequency and Phase modulation, and is quiteinsensitive to Amplitude modulation.
I think it is Frequency Modulation with Phase modulation which it the most bandwidth efficient
Advantages: it improves frequency stability. phase modulation n demodulation is easy as compared to frequency modulation.
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