Oqpsk

Oqpsk spectrum

Oqpsk spectrum
  1. What is OQPSK?
  2. Why OQPSK is preferred over QPSK?
  3. Where is OQPSK used?
  4. What is the spectral efficiency of QPSK?

What is OQPSK?

Offset quadrature phase-shift keying (OQPSK) is a variant of phase-shift keying modulation using four different values of the phase to transmit. It is sometimes called staggered quadrature phase-shift keying (SQPSK).

Why OQPSK is preferred over QPSK?

In systems employing power amplifiers with non-linear characteristics, offset quaternary phase-shift keying (OQPSK) is preferred over conventional QPSK due to its reduced degree of instantaneous phase transitions.

Where is OQPSK used?

The OQPSK modulation scheme is commonly used in high-speed wireless data transmission systems, especially terrestrial mobile communication systems, wideband satellite communication systems, digital video broadcasting systems, and various other systems 8-10.

What is the spectral efficiency of QPSK?

QPSK is very spectrally efficient since each carrier phase represents two bits of data. The spectral efficiency is 2 bits/Hz, meaning twice the data rate can be achieved in the same bandwidth as BPSK.

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