0
$\begingroup$

What is the difference between PSK (Phase Shift Keying) and QPSK (Quadrature Phase Shift Keying)? Doesn't PSK need quadrature component for its working?

$\endgroup$
2
  • 1
    $\begingroup$ PSK is not necessarily QPSK. QPSK is PSK. en.wikipedia.org/wiki/Phase-shift_keying#Higher-order_PSK They all have inphase and quadrature components. $\endgroup$
    – AlexTP
    Jun 2 '17 at 9:18
  • $\begingroup$ Your question is really good though. We often don't think on these lines with established terminologies. $\endgroup$
    – QMC
    Jun 3 '17 at 2:08
2
$\begingroup$

QPSK modulation is a PSK modulation with exactly 4 constellation points. The constellation points for QPSK are normally at $\left(\pm\dfrac{1}{\sqrt{2}}\pm\dfrac{1}{\sqrt{2}}j\right) $

$\endgroup$
1

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.