Signal forms and frequencies


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Message boards : SETI@home Science : Signal forms and frequencies

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Message 1065057 - Posted: 9 Jan 2011, 21:34:46 UTC

As a telecommunications engineer I'm interested in signal forms and frequencies that are being scanned by the SETI@home team. These may be silly questions, but I'm new to this, so bear with me ;-).

1) What kind of signal forms is SETI@home searching for? By signal form I mean for example AM, FM, TDMA, CDMA, QAM, OFDM?

2) Why is the frequency range limited to only 1418.75 - 1421.25 MHz?

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Message 1065148 - Posted: 10 Jan 2011, 2:15:14 UTC - in response to Message 1065057.

As a telecommunications engineer I'm interested in signal forms and frequencies that are being scanned by the SETI@home team. These may be silly questions, but I'm new to this, so bear with me ;-).

1) What kind of signal forms is SETI@home searching for? By signal form I mean for example AM, FM, TDMA, CDMA, QAM, OFDM?

2) Why is the frequency range limited to only 1418.75 - 1421.25 MHz?

Multibeam is looking for a CW type signal, which may be pulsed. The frequency chosen is near the hydroxyl resonant frequency. There is another project -- not Seti@Home -- Serendip that also checks the same data on a much larger bandwidth but not as sensitively.

Astropulse is looking for pulsed broadband signals, essentially what a pulsar puts out, which at our distance is about what a RADAR would look like.

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Message 1065163 - Posted: 10 Jan 2011, 2:58:09 UTC
Last modified: 10 Jan 2011, 3:03:31 UTC

And CW stands for?

Check out these pages: They are excellent!

http://seticlassic.ssl.berkeley.edu/

Choose "Signal candidates (new)" below Science -http://seticlassic.ssl.berkeley.edu/candidates.html

From there for example "Comprehensive List of promising Gaussian candidates".
http://seticlassic.ssl.berkeley.edu/Candidates/index.html

If you don't get it here, you might get it from there.

BTW: Wondering a little where mine fits.

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Message 1065179 - Posted: 10 Jan 2011, 4:57:26 UTC - in response to Message 1065163.

And CW stands for?

Any or all of the first three Technology entries:
http://en.wikipedia.org/wiki/CW

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Message 1065192 - Posted: 10 Jan 2011, 6:06:18 UTC
Last modified: 10 Jan 2011, 6:07:17 UTC

Thank you!

Checked it out. Good reading stuff there as well.

Message boards : SETI@home Science : Signal forms and frequencies

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