Forum Discussion
Altera_Forum
Honored Contributor
16 years agoFSK adding I&Q correctly in phase and amplitude
I've done an FSK decoder that already works very well but there is a request to enhance the sideband surpression. the transmitting part encodes its binary stream with fsk, where it sends out tw...
Altera_Forum
Honored Contributor
16 years agoThanks for all sugestions, i was able to solve it.
the final solution is very simple and very effective. both FIR filters for I and Q are now the same with different coefficient set differing by using sin or cosin for folding over a low pass filter that is tranformed with this folding into a band pass that includes a hilbert function for free as the hilbert is stamped into the coeficient set without the need of further multipliers :-) very very simple. the result is so good now that we can measure the limitations of sideband surpression the hardware has.