archive: SETI: Polarization Modulation

SETI: Polarization Modulation

Lloyd Doering ( )
Thu, 03 Sep 1998 21:02:46 -0500

Has any radio/communications work ever been done using polarization
We now use polarization to isolate stations in satelite microwave
broadcasts. I'm specifically wondering whether CW controlled circular
polarization, the direction and rate of change of polarization, could be
used to carry a complex signal. If it is possible, and practical, why
do we use modulation schemes that hog the available spectrum? The
average radio telescope, do they monitor polarization?