I was contemplating trying to use the timestamps and 4 antennas on the
same usrp{1,2} to try and create a smart antenna array for DOA...Dimitris Symeonidis "If you think you're too small to make a difference, try sleeping with a mosquito!" - Amnesty International On Thu, Mar 12, 2009 at 15:51, Douglas Geiger <[email protected]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Cocuzzo, Daniel C. wrote: >> I'm also wondering about how to extract ethernet packet information, >> such as timestamp. If anyone has any pointers to reference materials it >> would be greatly appreciated. >> >> Thanks, >> Dan >> >> > > The easiest way (depending on what you are doing with the timestamps) > is probably by dealing with the low-level libusrp2, and writing a custom > copy handler (look at rx_streaming_samples.cc in usrp2/host/apps). The > metadata structure (in usrp2/metadata.h) provides the timestamp from the > fpga. > I'm playing around right now with creating a custom source block that > has access to the timestamps (i.e. the copy handler passes it from the > low-level library into the source block - but not to the rest of the > flowgraph). I'm only interested in it as far as providing aligned > samples from two USRP2 (like usrp_multi does for the USRP1). Depending > on what you need the timestamps for, that may be the way to go. > Doug > > - -- > Doug Geiger > Research Assistant > Communications and Signal Processing Lab > Oklahoma State University > http://cspl.okstate.edu > [email protected] > [email protected] > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (Cygwin) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFJuSFmgfOzzR5bXIgRAl9uAKCbn2HziekL8O+kUIyg9uG4qwjB/QCfXxQL > sGldNGn6AVsCnzkM8gVFPqM= > =GDET > -----END PGP SIGNATURE----- > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
