Re: [Discuss-gnuradio] Need help identifying jammer signal

These look like 2pi jumps -- which is the an artifact if the unwrapping is not working well.



On Dec 10, 2013, at 1:55 PM, Johnathan Corgan <johnathan@corganlabs.com> wrote:

> On 12/09/2013 07:26 PM, Juha Vierinen wrote:
>
>> I recorded a 10 second snippet of 50 kHz baseband signal in interleaved
>> I and Q with 32-bit floating point format.
>
> The signal is definitely frequency modulated, but it doesn't appear to
> be by data. Plotting the unwrap(diff(unwrap(arg(s))) shows a repetitive
> structure of 10 ms (500 samples) width, as if something is stepping the
> frequency up or down at 100 Hz in a random walk.
>
> --
> Johnathan Corgan, Corgan Labs
> SDR Training and Development Services
> http://corganlabs.com
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