Re: [Discuss-gnuradio] Problem with receiving signal from satellite Thuraya-3

[John Malsbury]

Also, apparently, the two systems have opposite polarization:

http://www.peter2000.co.uk/aviation/satcomms/3G1216RL-P-XXX-X.pdf

-John

On Tue, Jan 28, 2014 at 8:32 PM, John Malsbury <address@hidden> wrote:

Cheng,

The resources I've read say that the downlink is 1525-1559 MHz, which is a ways off from Iridium's frequency of 1616-1626 MHz.

This would suggest that you should find a different antenna, like this one which covers both bands:

http://www.northernaxcess.com/satellite-communication-products/satellite-accessories/antennas/thuraya-antennas/sattrans-thuraya-hemi-omni-antenna/

-John

On Tue, Jan 28, 2014 at 6:24 PM, Cheng Chi <address@hidden> wrote:

Hi,

I think it's TDMA/FDMA, not spread spectrum. Each channel is about 30KHz.

Best regards,

Cheng Chi

On Wed, Jan 29, 2014 at 10:17 AM, Marcus D. Leech <address@hidden> wrote:

On 01/28/2014 09:14 PM, Cheng Chi wrote:

Hi,

I am trying to collect signal from Thuraya-3. Here is the setup I used:

- USRP N210 + WBX

- LNA with 30dB gain (ZHL-1217MLN)

- Iridium Antenna (I don't have specific antenna for Thuraya right now. Since Iridium and Thuraya frequency bands are quite close, I suppose it would work more or less)

Center frequency: 1530MHz

Sampling rate: 10MHz

From the spectrum (attached), I can see the Inmarsat signal, but no sign of Thuraya signal. Anyone has suggestion about how to receive the thuraya signal?

Best regards,

Cheng Chi

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Is the Thuruya signal spread spectrum?

-- 
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio