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 <john.malsb...@ettus.com>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 <ch000...@e.ntu.edu.sg> 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 <mle...@ripnet.com>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 >>> listDiscuss-gnuradio@gnu.orghttps://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 >>> Discuss-gnuradio@gnu.org >>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>> >>> >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> >
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