How doesn't it work? You should probably just use the hackrf_transfer program to record data from the HackRF. By default, it stores data in complex int8 format.
On Thu, Nov 19, 2015 at 2:18 PM, mourad ghafiri <[email protected]> wrote: > @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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