The majority of thermal noise enterimg the receiver is from the antenna and the path to the LNA. Freeze the antenna and this path, then you may be able to see GPS.
Lookup the formula for MDS and it will give you an idea of the temperature you need. Then select a coolant. Thermal noise is bandwidth dependent, so you may need multiple receivers. I don't know of any single chip solutions available to the public. Tom Rondeau <t...@trondeau.com> wrote: >On Wed, Sep 4, 2013 at 4:45 AM, Nemanja Savic <vlasi...@gmail.com> >wrote: >> After installing 3.6.5.1 there is a problem while when running >flowgraph. >> Flowgraph won't start, and the error is following: >> >> Using Volk machine: avx_64_mmx >> -- Loading firmware image: >/usr/local/share/uhd/images/usrp1_fw.ihx... done >> -- Opening a USRP1 device... >> -- Loading FPGA image: /usr/local/share/uhd/images/usrp1_fpga.rbf... >done >> -- Using FPGA clock rate of 64.000000MHz... >> *** glibc detected *** /usr/bin/python2.6: malloc(): memory >corruption: >> 0x0000000005661000 *** >> *** glibc detected *** /usr/bin/python2.6: malloc(): memory >corruption: >> 0x0000000005661000 *** >> >> Is this problem due to python 2.6 maybe? >> >> Cheers > >Shouldn't be. I believe that I've tested 3.7 using Python 2.5 and 2.6. > >How about just starting gnuradio-companion and seeing if you can run a >simple flowgraph without any hardware? > >Did ctest (or 'make test') pass? > > >-- >Tom >Visit us at GRCon13 Oct. 1 - 4 >http://www.trondeau.com/grcon13 > > >> -- >> Nemanja Savić > >_______________________________________________ >Discuss-gnuradio mailing list >Discuss-gnuradio@gnu.org >https://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
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