Better late than never, but massive thanks to Andy, Marcus and the
GnuRadio community:
https://dirkgorissen.com/2019/01/06/wheres-pinoh-tracking-orangutans-with-drones-and-gnu-radio/
On Mon, 27 Mar 2017 at 09:09, Dirk Gorissen wrote:
>
> Hi Andy,
>
> What can I say, this is amazing.
g list as well.
>
> Regards,
> Adrian
>
> On May 4, 2018 2:24:46 PM UTC, Andy Walls
> wrote:
>>>
>>> From: Dirk Gorissen
>>> Date: Thu, 3 May 2018 22:25:09 +0100
>>>
>>> Hello,
>>>
>>> Im using an airspy mini throu
Hello,
Im using an airspy mini through the osmosdr block. I would like
control over the 3 gains the airspy has (IF, Mixer, LNA) but the
osmossdr block does not seem to expose this. Is there a workaround?
Cheers
Dirk
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Di
but I thought it safe to clarify.
So consider this case closed for now :)
Thanks again!
Cheers
Dirk
On 12 March 2018 at 12:05, Müller, Marcus (CEL) wrote:
> Hi Dirk,
>
> On Sat, 2018-03-10 at 22:22 +0000, Dirk Gorissen wrote:
> …snippety snip…
>> My assumption was that the cent
Hi All,
This should be a simple question. I have the following:
sdr -> decimation/filters -> stream to vector -> FFT -> complex to
mag2 -> log10 -> python block - > ...
The FFT block is configured as:
type: complex
Direction: Forward
Shift: yes
length: equal to input vector length
The python bl
0 is a critically damped system, and >1.0 is an overdamped
> system. For your application, you definitely want an underdamped
> system. You might want to experiment with damping factors less than
> the default.
>
> Also, in this flowgraph, I separated the out the final, non-deci
f the SDR's LNA and IF gains for best noise performance
> would help.
>
> Also being able to narrow down the possible variation in frequencies
> where the signal might be at, say a 2 kHz channel vs. a 10 kHz
> channel, would allow additional noise filtering and lower PLL loop
&
at the time it was locked on the pulse. You
>> can then use this exact frequency information for a dedicated
>> correlation filter to pull even weaker pulses out of the noise, and
>> maintain track. You'll have to use the magnitude of the correlation and
>> not just the re
=0B5dKo9igl8W4WkRkUGQzcVJsQnc
Havent managed to look at the pll stuff yet. Aim to do so this weekend.
Cheers
Dirk
On 16 March 2017 at 07:22, Dirk Gorissen wrote:
> Mmm, thats odd. Those settings should be correct, maybe something went
> wrong with the recording :( I'll try to check in between things at
&
that range.
>
> Thanks.
>
> -Andy
>
> On Wed, Mar 15, 2017 at 5:23 AM, Dirk Gorissen wrote:
>> Hi Andy, Marcus,
>>
>> Thanks very much for taking the time to think about this.
>>
>> Just to answer your questions:
>>
>>>Dirk'
t; interest. (A complex bandpass filter does not have a symmetrical
>> image
>> > around DC.)
>> >
>> > The burst/energy detector has to detect some minimum number of time
>> > domain samples contiguously above some noise/signal threshold that
>> you
&g
at 01:09, Martin Braun wrote:
> How related are those filters? Is this a candidate for polyphase DSP?
>
> -- M
>
> On 03/11/2017 02:01 PM, Dirk Gorissen wrote:
>> Hi Marcus,
>>
>> Sorry, I should have clarified. You may recall an earlier thread from
>> mi
at this gets a lot easier as soon as you tell us why
>> you're doing this, i.e. for what purpose :)
>>
>> Best regards,
>> Marcus
>>
>> On 11.03.2017 19:28, Dirk Gorissen wrote:
>>> Hello all,
>>>
>>> Given a stream of samples I w
Hello all,
Given a stream of samples I would like to apply n slightly different
filters to it with n being able to be chosen at runtime. Then combine
the results back to a single stream.
As a test I built a flowgraph with the following chains in parallel for n = 6
| -> decimatin
s analog tech can help: try
> to lower total NF using a tuned LNA in front of you receiver... RTL dongles
> or other sampler are a bit deaf and noisy, and your signal seems very
> feeble.
>
> ... my 2 eurocent... !
>
> Victor
>
> 2017-02-10 0:01 GMT+01:00 Dirk Gorissen :
> are just approaching GNU Radio, and aren't already familiar with a lot of
> the stuff that we've gotten used to.
>
> Happy tracking,
>
> Marcus
>
> [1] http://www.sigidwiki.com/wiki/Adding_a_Signal_Entry
> [2]
> http://gnuradio.org/blog/filtering-time-series-data
.
Cheers
Dirk
On 7 February 2017 at 03:18, Dan CaJacob wrote:
> Hey Dirk,
>
> Just curious, are you doing this for fun or profit?
>
> On Mon, Feb 6, 2017 at 3:40 PM Dirk Gorissen wrote:
>
>> Thanks Marcus & Martin for the responses.
>>
>> To clarify, Im working
thing to do here given I may
> also have to deal with quite a bit of noise.
>
> As a gut feeling: you don't really care about whether the pulse is
> *exactly* at a certain frequency (it's absolutely not normal for wireless
> receivers to know the exact frequency a priori
Fist of all, while Im a newbie to (gnu)radio, congrats to the dev team
for a great piece of software.
My question is about the need to detect a weak, noisy, short (10ms)
pulse that occurs every 1.5 seconds. It is transmitted at a particular
frequency (e.g., 150.22 MHz) but in practise I have found
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