For a given bit-rate, what requires half the bandwidth of PSK and is widely used for this reason?
A. Quadrature Amplitude Modulation
B. Quadrature frequency-shift-keying (QFSK)
C. Quadrature amplitude-shift-keying (QASK)
D. Quadrature phase-shift-keying (QPSK)
Show Answer
Answer: D
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