Run your signal into magnitude_squared -> integrate_with_decimation ->
k+log(10) . That will compute mean square power. Feed in a calibrated CW
tone, then offset k to match the calibrated value.
Lou
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Discuss-gnuradio mailing list
On 03/21/2018 10:12 PM, Dario Fertonani wrote:
> No comments on this? It's a major bug introduced in the new release, in
> my opinion.
>
> Anybody can replicate it by running the official test file linked below,
> when compiled with UHD 3.11 from Ubuntu PPA.
>
>
Nope! That's a common misconception!
The file sink just writes the bits as they come in. Whether, for
example, a 64 bit item is actually a complex number consisting of two
32 bit IEEE754 floats, or a double, or two 32 bit integers, or one
64bit integers, or just a vector of 8 Bytes of data (chars)
Hi Ivo,
The binary format depends on what you have set as the "Input Type" in the file
sink. The default is "Complex" in which case the values are 32-bit float I
followed by 32-bit float Q. The order of the 4-bytes in the float likely
depends on the endianness of your host system.
--Patrick
Hi all,
the project call for April will start in 8 minutes (it'll be at 10 AM
Pacific time).
To follow the live event:
http://youtu.be/MlyVOs8fkH4
To join the call and participate:
https://hangouts.google.com/hangouts/_/pb5arg52c5bqbh6pdt5gb5xoo4e
Cheers,
Martin
Priyanka,
I believe the easiest way to find GPS satellites* is to perform an FFT on
the baseband as well as FFT of each of the 32 PRN sequences (in reality you
don't need to look at all 32 of them)
Perform a cross correlation with something like (pseudocode follows):
for binshift = -n:n
{
a=
at least your fc in the Matlab script is incorrect: removing the
carrier frequency has been taken care of by the RF frontend (R820T2).
You are only left with the offset between the GPS carrier and the frontend
carrier + Doppler shift. Doppler is in the +/5 kHz range, but offset can
be up to
Dear 김무연,
"RSSI" means "Received Signal Strength Indication" or "Index", and
isn't universally defined.
Either you're looking at a specific wireless comm standards that
defines that value, or you need to invent your own definition.
Please do your research on this and if you feel like it, we'd
That's exactly how it technically is.
On Thu, 2018-04-19 at 11:37 +0200, Markus Wirsing wrote:
> My experience has been that letter suffixes are only used for displaying
> values, and not for entering values.
smime.p7s
Description: S/MIME cryptographic signature
My experience has been that letter suffixes are only used for displaying
values, and not for entering values. Are you sure the examples used that
notation to enter values?
Am 18.04.2018 um 22:04 schrieb Robert Stanford:
>
> I can use scientific notation, such as 2.4e6, in GNU Radio blocks.
>
Hi allI want to ask somethingHow can I get RSSI of the received signalI use two computers and 2usrps n210 as a transmitters and 1 usrp as a receiverIn transmitter, I want to estimate the RSS or RSSI of the received signal per one periodAre there any blocks? or any methods to estimate the RSS or
Hi Neil,
this is rather surprising, as __GR_VLA is defined in
gnuradio/attributes.h, which is included in inspector/api.h, which is
included in inspector/ofdm_bouzegzi_c.h, which is included in
lib/ofdm_bouzegzi_c_impl.h, which in turn is included in
ofdm_bouzegzi_c_impl.cc, which is where your
Hi all,
I am trying to install gr-inspector, I have recently installed clean O/S -
Ubuntu 16.04LTS and GNU Radio 3.7.9. I installed the dependencies listed on
github for gr-inspector including tensorflow (without GPU support). When
running cmake.. there are no errors.
However, when
I am collecting from the RTL-SDR dongle has amplitude in range
of 0.04(peak to peak). Can we be sure of having GPS signal it and is such
low strength of signal okay for GPS acquisition or not?
that's the beauty of spectrum spreading and pulse compression: despite
the signal being below thermal
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