Question

Arrange the following modulation schemes in increasing order of bits/symbol: A. 16-QAM B. 8-PSK C. QPSK D. BPSK

• A. A, B, C, D
• B. A, B, D, C
• C. D, C, B, A
• D. D, C, A, B

Hint:

Bits = $\log_2 M$.

Answer 1

The Correct Option is C

Concept: Bits per symbol: \[ \text{Bits} = \log_2(M) \]

Step 1: Calculate \[ \text{BPSK} = 1,\quad \text{QPSK} = 2,\quad \text{8PSK} = 3,\quad \text{16QAM} = 4 \]

Step 2: Increasing order \[ D < C < B < A \] \[ \therefore \text{Correct answer is (C)} \]