digital communcation

  1. alexbez


    Hey guys, I am trying to diagnose what the issue is with my Kurzweil CUP2 digital Piano The piano displays no sign of life besides a red on led. LCD screen does not display anything Buttons do not seem to do anything(there is a little red light above each button that indicates the "mode" it is...
  2. Hekiem

    Understanding Phase-offset in 4-QAM/QPSK

    I stambled on a Matlab solution to calculate the phase by which symbols in the Rx of a 4-QAM have been shifted and therefore do the phase correction. The solution is only custome to Tx'ng and Rx'ng 432 bits, which therefore takes 2bits per symbol. The thing is, i don't understand well how they...