Topic: Electronics Engineering
What is the advantage of Offset QPSK (OQPSK) compared to conventional QPSK?
- A. Constant envelope
- B. Bandwidth efficiency
- C. Simple demodulator
- D. All of these
Answer: A. Constant envelope
Explanation: Offset QPSK delays the Q channel by half a symbol period, preventing simultaneous transitions in the I and Q channels. This avoids 180-degree phase shifts, thus minimizing envelope fluctuations and maintaining a more constant envelope.