whatbis GMSK MODULATION ?
the modulation system is of FM
Frequency modulation Phase modulation
QAM is a combination of phase modulation & amplitude modulation.
Collector modulation is the amplitude modulation in which modulator varies the collector voltage of a transistor.
AM imply amplitude modulation of a carrier signal
It uses GFSK (Gaussian Frequency Shift Keying) modulation technique.
An FSK Modulator is much the same as a GFSK Modulator ,but GFSK uses a Gaussian filter as well. In a GFSK modulator everything is the same as a FSK modulator except that before the baseband pulses (-1, 1) go into the FSK modulator, it is passed through a gaussian filter to make the pulse smoother so to limit its spectral width.
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AM - Amplitude Modulation FM - Frequency Modulation
modulation
Frequency Modulation and Phase Modulation
frequency modulation..
due to velocity modulation density modulation occurs in TWT
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.
the modulation system is of FM
i dont know ans. of this.
QAM is a combination of phase modulation & amplitude modulation.