Q. In DPSK system, input signal is differentially encoded and then modulated using a ________ modulator.

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Q. The energy efficiency of DPSK is _________ to coherent PSK.

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Q. QPSK has ________ the bandwidth efficiency of BPSK.

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Q. QPSK provides twice the bandwidth efficiency and _______ energy efficiency as compared to BPSK.

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Q. What is the full form of OQPSK?

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Q. The bandwidth of OQPSK is _______ to QPSK.

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Q. QPSK signals perform better than OQPSK in the presence of phase jitter.

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Q. Which of the following is not a detection technique used for detection of π/4 QPSK signals?

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Q. In non-linear modulation, the amplitude of the carrier varies with the variation of modulating signal.

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Q. In constant envelope family of modulation, class C amplifiers introduces degradation in spectrum occupancy.

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Q. Constant envelope modulation techniques occupy ______ bandwidth than linear modulation schemes.

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Q. In BFSK __________ of constant amplitude carrier signal is switched between two values.

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Q. MSK stands for ________

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Q. What is the modulation index of MSK?

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Q. The modulation index of an FSK signal is similar to modulation index of ________

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Q. The name minimum phase shift keying implies minimum _________

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Q. MSK is sometimes also referred as _________

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Q. Which of the following is not a property of MSK?

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Q. MSK is a special form of OQPSK.

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Q. GMSK is a ________ of MSK.

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