On Mon, Feb 27, 2012 at 7:36 AM, Jeff Hodges <jeffhodg...@gmail.com> wrote: > Does anyone know if the QAM demodulator code is working properly? I would > like to get a QAM demodulator working for a symbol rate of 300ksym/s. I > don't know whether I am just using the wrong parameters or if the blocks do > not work properly, but I am not getting the results I expect. > > To test the code out I am using the GRC. I have a vector source with a known > data sequence running into the qam mod block and then the output of that > into a QAM demod block. The output of the QAM demod is running into a Uchar > to Float, and I am plotting the results on a WX GUI Scope. I have the exact > same settings on both the QAM mod and demod blocks. The output I am seeing > on the scope looks completely random. (I also tried other vector source > data: When the input is 0x0F, repeating, the output I see is 00001010 > repeating. But when I use 0x0E, the results are random again.) > > I have also tried demodulating a real QAM signal with a known data sequence, > also to no avail. > > I have been working on this for about a month now and haven't had any > success. I have examined the underlying QAM.py and generic_mod, > generic_demod codes, and they seem to be written properly. But I am not > getting the expected results. > > Any help with this problem or advice you can give will be greatly > appreciated, and I will return the favor by helping out in any way that I > can. > > Thank you very much in advance, > > Jeff > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
If it's not working it's probably my fault, so I'll do some tests myself today and get back to you. Cheers, Ben _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
