E8C01 : What is Quadrature Amplitude Modulation or QAM?
A
A technique for digital data compression used in digital television which removes redundancy in the data by comparing bit amplitudes
B
Transmission of data by modulating the amplitude of two carriers of the same frequency but 90 degrees out of phase
C
A method of performing single sideband modulation by shifting the phase of the carrier and modulation components of the signal
D
A technique for analog modulation of television video signals using phase modulation and compression
Correct Answer: Transmission of data by modulating the amplitude of two carriers of the same frequency but 90 degrees out of phase