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From: | Saul E. |
Subject: | Re: [Discuss-gnuradio] Doppler simulator |
Date: | Mon, 22 Dec 2014 10:45:07 +0100 |
Thank you.
Saul E.
Hi Saul,
a doppler shift is, mathematically speaking, nothing more than a multiplication with a complex sine, so use a multiply block and a signal source per simulated sattelite.
Now, you might want to update your doppler shift according to a simulated sattelite's position. I recommend having a look at PyEphem[1], which offers you calculational routines for such things, and writing your own python block[2] to generate the complex sine.
Greetings,
Marcus
[1] http://rhodesmill.org/pyephem/
[2] http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorials ; go through tutorials 1, 2, 3
On 12/22/2014 10:14 AM, Saul E. wrote:
Saul E.Thank you very much in advance.Hi all!!Signal1, signal2 and signal3 are BPSK signals and I use a USRP N200.
I am developing a SDR receiver and want to simulate the doppler of signal from several satellites.
Any suggestions?
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