@Karl Koscher unfortunately the approach doesn't function well... please any hint to achieve that goal which is:
having an GPS L1 signal streaming for post processing with matlab/octave ? we have HackRF and a GPS L1 antenna ... but we don't have enough knowledge in hardware side, but we do know how to manipulate a file streaming with float or int8 matrix data in Matlab/octave. Yours Sincerely; On Thu, Nov 19, 2015 at 10:11 PM, mourad ghafiri <[email protected]> wrote: > @David Brown > > I appreciate your interaction with that basic question, in fact we are > recording a L1 GPS streaming for post processing in a Matlab project for > GPS positioning... so all we need simply is a file that contain an int8 > type record. > > @Karl Koscher > > thank you so much, I will try this blocks Immediately and get back to you; > if you still have time to complete this friendly (hackerfly :) ) > conversation. > > On Thu, Nov 19, 2015 at 10:04 PM, Karl Koscher <[email protected] > > wrote: > >> Use a Complex to Float/Real and Float to Char type converter block >> between the HackRF source block and the file sink, and then change the file >> sync type to char. Or you can use the hackrf_transfer program and avoid >> these conversions altogether. >> >> On Thu, Nov 19, 2015 at 1:49 PM, mourad ghafiri <[email protected] >> > wrote: >> >>> thank you for your quick answer, please how to record the streaming in >>> int8 type >>> >>> Regards; >>> >>> On Thu, Nov 19, 2015 at 9:40 PM, Karl Koscher < >>> [email protected]> wrote: >>> >>>> You are recording complex floats. The intermediate frequency is your >>>> frequency of interest minus what the HackRF is tuned to. If your HackRF is >>>> tuned to 1.575 GHz but you want to decode the GPS L1 signal, then your IF >>>> is 420 kHz. >>>> >>>> On Thu, Nov 19, 2015 at 1:36 PM, mourad ghafiri < >>>> [email protected]> wrote: >>>> >>>>> I attached the flow graph for the recording as well as a real time >>>>> spectrum , I'm not sure what blocks to use or what parameters to set for >>>>> this block in order to have the right streaming. >>>>> thanks for showing interest to the question >>>>> >>>>> On Thu, Nov 19, 2015 at 9:16 PM, Karl Koscher < >>>>> [email protected]> wrote: >>>>> >>>>>> How are you recording the samples? >>>>>> >>>>>> On Thu, Nov 19, 2015 at 1:05 PM, mourad ghafiri < >>>>>> [email protected]> wrote: >>>>>> >>>>>>> Hello; >>>>>>> >>>>>>> please any help to figure out what is the Intermediate Frequency >>>>>>> used for HackRF in Gnuradio... >>>>>>> >>>>>>> I'm recording a streaming file for GPS and I don't know what is the >>>>>>> appropriate type ( int; float...) and what is the appropriate IF to use >>>>>>> in >>>>>>> order to process that streaming in Matlab. >>>>>>> >>>>>>> Best Regards; >>>>>>> >>>>>>> _______________________________________________ >>>>>>> HackRF-dev mailing list >>>>>>> [email protected] >>>>>>> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >
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