Physics · Communication Systems
Which of the following statements are correct? A. M-ary modulation scheme is preferable where the bandwidth requirement is important. B. M-ary PSK system considers 'M' different phases in the range '2π'. C. In M-ary modulation scheme, only coherent detection is possible. D. M-ary QAM scheme uses 'm 2 ' carrier signals having the same frequency.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1C and D only
- 2B and C only
- 3A and C only
- 4A and B only✓
Correct answer
A and B only
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