On Sun, Dec 09, 2007 at 07:47:37PM -0800, Peter Monta wrote: > > [ I/Q compensation ] > > There's some discussion in Razavi's "RF Microelectronics", section 5.2.2, > and Kenington's "Software Defined Radio", section 5.3.1.1. The distinction > you mention between DC and AC might come from this LO self-mixing > business, a nonlinear effect, and indeed only at DC since it involves > the LO mixing with itself at some random amplitude and phase. AC > coupling would eliminate this artifact, but it would do nothing for the > linear I/Q mismatch errors. > > Maybe future versions of the dbsrx could have I/Q compensation parameters > in the EEPROM. Or is something there already? > > Cheers, > Peter
It's on the list of things to do. Nobody's gotten to it yet. It sounds like you may be the person we've been looking for ;) There is room in the daughterboard EEPROM for storing the parameters. We can work out a specific location when you're ready. If you've got the time and inclination, please have a go at the I/Q compensation. It would be great to have. Please post any questions, etc. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
