Question

What is the full form of OQPSK?

(a) Optical Quadrature Phase Shift Keying

(b) Orthogonal Quadrature Pulse Shift Keying

(c) Orthogonal Quadrature Phase Shift Keying

(d) Offset Quadrature Phase Shift Keying

This question was posed to me in unit test.

The origin of the question is Linear Modulation Techniques topic in chapter Modulation Techniques for Mobile Radio of Wireless/Mobile

Answer 1

The correct option is (d) Offset Quadrature Phase Shift Keying

The explanation is: OQPSK stands for offset quadrature phase shift keying. It is a modified form of QPSK which is less susceptible to deleterious effects and supports more efficient amplification. OQPSK is sometimes also called staggered QPSK.