I'm in the process of simulating the performance of a GFSK modem in GNU Radio. I have managed to get a curve similar to the curves I see in a number of literature sources. However, I need an accurate baseline that can show how accurate (or far of) the performance is. This might be trivial but I have spent quite a number of hours trying to find out a closed-form BER vs SNR for GFSK. All I have seen so far is BER vs SNR for GMSK only. So my questions are:
- Does the closed form of BER for GFSK exist at all?
- Is there any explanation as to why it doesn't exist?
All answers and references will be highly appreciated.