Hi I have taken a look at the freeDV-Implementation, which I can not build currently (cmake). But in the API, there is an explanation about the demodulation properties which I can use for understanding what is going on... I will try further...
73, hb9epu On 06.10.2014 16:28, wully wrote: > Hi > > I am new to this list and to the topic of freeDV. But I have built a > Software-TRX (STRX), which controls a HPSDR system with > Mercury,Pennylane and Metis. My system is Linux - openSUSE 13.1 > > Now, I have used the codec2 shared library from SVN 1324 to implement > freeDV directely in my STRX (no soundcards etc). For my current tests, > I am using 1400 code2-mode and 14 carriers for fdmdv. So, I am > processing 320 Samples@8kHz. > For the TX-Side, there was no problem. I could verify, that the > fdmdv_mod() - output is correct (by using the fdmdv_demod and > c2dem-Programs). > So, I assume, that the TX-Side is ok. > > But now I try to get the RX-Side running. I have looked into the > testprogram fdmdv_demod, how to do this. But I don't get a correct > demodulation just with the data from the TX-side (not over HF!) in my > STRX. > > When tracing the loop of fdmdv_demod-program with a modemtestfile, I > see that reliable_sync_bit is toggling between 0 and 1. > Does it not tell, wether the sync is ok? So, for a good input, after a > while, it should be stable? > > I don't understand, what is going on: > Questions: > a) what is the exact meaning of reliable_sync_bit > b) what is the exact meaning of the nin? > c) I would like to process 320Samples@8kHz using two fdmdv_demod() > calls. How to get it stable? > > Sorry for my questions. > > 73, hb9epu, Alfred > > > > > > > ------------------------------------------------------------------------------ Slashdot TV. Videos for Nerds. Stuff that Matters. http://pubads.g.doubleclick.net/gampad/clk?id=160591471&iu=/4140/ostg.clktrk _______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
