E8C01

What is Quadrature Amplitude Modulation or QAM?

1. AA technique for digital data compression used in digital television which removes redundancy in the data by comparing bit amplitudes
2. BTransmission of data by modulating the amplitude of two carriers of the same frequency but 90 degrees out of phase
3. CA method of performing single sideband modulation by shifting the phase of the carrier and modulation components of the signal
4. DA technique for analog modulation of television video signals using phase modulation and compression

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