I am also in the process of studying this part of the software to see if I can use it to recreate my data from the demodulated signal.
Can anyone provide information on what are sync field, seq number and command field that are added to the payload? I need to recreate this in my transmitter which is not usrp/gnuradio based. It's just a simple micro controller. So far I have not been able to understand what the gr_simple_framer does. Does the framer convert digital data stream to self-synchronizing code? My transmitter clock rate is not a multiple of 64 MS/s and therefore so is my data rate. Will this cause difficulty? I am using very low data rate and with short retransmission time. Mike, if you get your code to work, I would like to see it and what does the input data file look like. Thanks, Mike Original Message: ----------------- From: Eric Blossom [EMAIL PROTECTED] Date: Thu, 17 Nov 2005 10:53:38 -0800 To: [EMAIL PROTECTED], discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Help using simple_framer and simple_correlator On Wed, Nov 16, 2005 at 11:22:28AM -0500, [EMAIL PROTECTED] wrote: > In order to gain a better understanding of how the simple_framer and the > simple_correlator work, I am trying to implement the following code. However, > when I run the program, I don't get any output. I'm not sure what I'm doing > incorrectly. Once I determine my error, I am also interested on how to use > lfsr_32k_source_s (to replace the file_source) and check_lfsr_32k to determine > error rates in this simple program. Any help would be appreciated. > > Thank you, > Mike Hi Mike, Not sure if you've still got this question, but the problem is that the output of sample_framer + bytes_to_syms can't be directly connected to simple_correlator. The simple correlator exepects its input to be oversampled 8x times. Just wiring them together as you have doesn't honor that requirement. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -------------------------------------------------------------------- mail2web - Check your email from the web at http://mail2web.com/ . _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio