Hi,
> May I know what's the setup you used for receiving the signal? The spectrum
> looks very clear.
* The antenna was a homemade helical antenna : http://i.imgur.com/c6JaySJ.png
* It's followed by a modified LNA23 (to be centered at 1550 MHz). This
is a 30 dB LNA with a < 1dB NF with a built-in
Hi Sylvain,
May I know what's the setup you used for receiving the signal? The spectrum
looks very clear.
Best regards,
Cheng Chi
On Sat, Mar 29, 2014 at 11:39 PM, Sylvain Munaut <246...@gmail.com> wrote:
> This is what I found for inmarsat :
>
> http://i.imgur.com/KygwHdD.jpg
>
> Some 200 kHz
> Did you use gr-phosphor for that plot?
Of course :)
-F option of osmocom_fft enables it directly.
Cheers,
Sylvain
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Did you use gr-phosphor for that plot?
On Mar 29, 2014, at 10:39 AM, Sylvain Munaut <246...@gmail.com> wrote:
> This is what I found for inmarsat :
>
> http://i.imgur.com/KygwHdD.jpg
>
> Some 200 kHz channels and some 50 kHz channels.
>
> There is also some 30 kHz channels with a small 'X' per
This is what I found for inmarsat :
http://i.imgur.com/KygwHdD.jpg
Some 200 kHz channels and some 50 kHz channels.
There is also some 30 kHz channels with a small 'X' periodically in
the spectrograme. Those are GMR-1 and probably leak through from
Thuraya (either reflections off buildings, or my
1531 MHz signals from what? If you are using a patch antenna then it
probably won't have the bandwidth to cover 100 MHz.
Lou
KD4HSO
Cheng Chi wrote
> - Iridium antenna (I am not able to get specific antennas for
> Inmarsat...Iridium is at 1616 -1626.5 MHz and Inmarsat is at 1525-1559
> MHz.
> I
-bounces+ralph=schmid@gnu.org
[mailto:discuss-gnuradio-bounces+ralph=schmid@gnu.org] On Behalf Of Cheng
Chi
Sent: Friday, March 28, 2014 9:41 AM
To: GNURadio Discussion List
Subject: [Discuss-gnuradio] Questions about receiving signals of Inmarsat I-4
Satellites
Hi,
I am trying to
Hi,
I am trying to receive signal from I-4 satellites of Inmarsat.
I found that I-4 satellites have one global beam with 25 KHz bandwidth and
several regional beams with 50 KHz bandwidth. However, I have scanned
through frequency band 1525-1559 MHz and haven't been able to find those
beams.
Anyo
