engineering recuitment NIELIT Scientific Assistant Mock Test 2025 Communication Systems Introduction To Digital Modulation
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 'π/2'.
C. In M‐ary modulation scheme, only coherent detection is possible.
D. M‐ary QAM scheme uses 'm2' carrier signals having the same frequency.
Choose the correct answer from the options given below:
1
A and B only
2
A and C only
3
B and C only
4
C and D only