@Karl Koscher I used the Gnu radio, I will use the hackrf_transfer , but please would you help for IF parameter [-i if_freq_hz] # Intermediate Frequency (IF) in Hz [2150MHz to 2750MHz] ?
I don't know what to set for IF since I need to tune hackrf at 1.575 GHz and Bandwidth of 2 MHz and a sampling rate > 2*2 MHz would you give me a complete command for these requirements, Thank you so much in advance Regards; On Thu, Nov 19, 2015 at 10:22 PM, Karl Koscher <[email protected]> wrote: > 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 >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>> >>>>>> >>>>> >>>> >>> >> >
_______________________________________________ HackRF-dev mailing list [email protected] https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
