Hello Everyone, I've made a basic DBPSK transmitter and receiver. I can receive ASCII strings fine and the spectrum looks exactly as it should.
However, if I swap the DBPSK modulator/demodulator for the DQPSK modulator/demodulator, my system breaks. I can no longer receive the same strings and the spectrum looks very strange. It's much wider and triangular shaped. Same goes for the D8PSK system and the D16PSK system I recently was asking about. I believe marcin_w asked a similar question a few days ago and I haven't seen a reply yet (am I wrong?) My question is, should I be doing something different? Do I need to add in some extra block when I switch from DBPSK to DQPSK? While searching old posts, I found some people talking about DQPSK not working correctly, but that was about a year ago. Any help would be greatly appreciated. Devin
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