QPSK Model

I am trying to build Qpsk modulator. I used Binary generator as my Input bit stream ant used Demux to split into I and Q but when I ran it is given me dimension error.That dimension is being set to one input/output Demux mut be equal. Pls any help?

Answer 1

[Rick Rosson]

Instead of the binary generator, use the Random Integer Generator, and set the M-ary number to a value of 4. This will generate the integers 0...3 with equal probabilities. Then connect the output of the generator block to the input of the QPSK Modulator, and connect the output to a Scatter Plot Scope.

HTH.

Answer 2

[mushreq Al tememy]

hi Mr rick rosson, i am doing the same thing but i have already my signal which is CDMA signal , when i inject my signal(cdma) to QPSK it doesnt work??? what should i do to make it works plz...thx