8psk demodulation

1. What is 8PSK modulation?
2. What is the difference between QPSK and 8PSK?
3. How many bits is 8PSK?
4. Where is 8PSK used?

What is 8PSK modulation?

8PSK modulation means that the upper sideband signals of the two first-order sidebands suppressed by the carrier , are averagely divided into 8 phases and then synthesized. As shown in Figure 2, the upper and lower two signals are orthogonal to each other, but the amplitude is different.

What is the difference between QPSK and 8PSK?

QPSK, or Quadrature Phase-Shift Keying, uses four distinct phase-shifts to encode data. These phase-shifts are 45 degrees, 135 degrees, 225 degrees and 315 degrees. In contrast, 8PSK, or Eight Phase-Shift Keying, uses eight distinct phase-shifts.

How many bits is 8PSK?

8 Phase-Shift Keying (8PSK) is a form of phase modulation with eight phase states located at 0, π, +/-(π/4), +/-(π/2) and +/-(3π/4) radians in the IQ plane. Each symbol carries log₂(8) = 3 bits of information. A sample 8PSK constellation is shown below.

Where is 8PSK used?

Both QPSK and 8PSK are widely used in satellite broadcasting.