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 <[email protected]> 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 <[email protected]>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 >> [email protected]https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> Is the Thuruya signal spread spectrum? >> >> >> >> -- >> Marcus Leech >> Principal Investigator >> Shirleys Bay Radio Astronomy Consortiumhttp://www.sbrac.org >> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> [email protected] >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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