[Hackrf-dev] how to set IF in GNU Radio for HackRF

[mourad ghafiri]

@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 <supersat at cs.washington.edu>
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 <mourad.ghafiri at gmail.com>
> 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 <supersat at cs.washington.edu
>> > 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 <
>>> mourad.ghafiri at gmail.com> 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 <
>>>> supersat at cs.washington.edu> wrote:
>>>>
>>>>> How are you recording the samples?
>>>>>
>>>>> On Thu, Nov 19, 2015 at 1:05 PM, mourad ghafiri <
>>>>> mourad.ghafiri at gmail.com> 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
>>>>>> HackRF-dev at greatscottgadgets.com
>>>>>> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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