FIG. 9 is a block diagram of the signals and logic used in conjunction with a polarization hopped signal to detect and eliminate a spoof signal in a diversity polarization modulated navigation signal, according to an example embodiment.

FIG. 10 is a block diagram of a transmitter configured to simultaneously send first and second codes using right hand circular polarization and left hand circular polarization, respectively, according to an example embodiment.

FIG. 11 is a block diagram of a receiver configured to receive and demodulate a signal containing first and second codes using right hand circular polarization and left hand circular polarization, respectively, according to an example embodiment.

FIGS. 12A and 12B are a block diagram of a transmitter configured to transmit pseudo-noise codes using diversity polarization modulation and in-phase and quadrature channels, and a chart indicating the overall polarization of the output electromagnetic radiation, respectively, according to an example embodiment.

FIGS. 13A, 13B and 13C are a block diagram of a first receiver configured to receive and demodulate a signal transmitting pseudo-noise codes using diversity polarization modulation and in-phase and quadrature channels, a chart indicating the overall polarization of the received electromagnetic radiation, and a second receiver configured to receive and demodulate a signal transmitting pseudo-noise codes using diversity polarization modulation and in-phase and quadrature channels, respectively, according to example embodiments.