Which modulation spectrum has narrow main lobe?
A. QPSK
B. OQPSK
C. BPSK
D. MSK
Answer:A
Which modulation spectrum has narrow main lobe?
A. QPSK B. OQPSK C. BPSK D. MSK
Explanation: QPSK has narrower main lobe than MSK because for a given rate the QPSK symbol rate is half the MSK symbol rate.