Simultaneous multi-polarization receiving with cross-polarization interference cancellation

A system comprising:

• an X-demodulator to receive an X-input signal and to generate one or more X-symbol decision signals at an X-symbol decision output based on the X-input signal, the X-input signal being an X-signal with Y-cross-polarization interference contributed by interference from the Y-signal, the X-signal having been received by a receiver in a first polarization;
• a Y-demodulator to receive a Y-input signal and to generate one or more Y-symbol decision signals at a Y-symbol decision output based on the Y-input signal, the Y-input signal being a Y-signal with X-cross-polarization interference contributed by interference from the X-signal, the Y-signal having been received by the receiver in a second polarization that is nominally orthogonal to the first polarization, the X-signal and the Y-signal received simultaneously over a same frequency channel;
• an X-channel adaptive canceler (X-CAC) coupled with the X-demodulator and the Y-demodulator, and configured to apply the Y-symbol decision output to an X-feedback control loop to adaptively cancel contributions of the Y-cross-polarization interference from the X-symbol decision output to generate an X-output signal;
• and
• a Y-channel adaptive canceler (Y-CAC) coupled with the X-demodulator and the Y-demodulator, and configured to apply the X-symbol decision output to a Y-feedback control loop to adaptively cancel contributions of the X-cross-polarization interference from the Y-symbol decision output to generate a Y-output signal,
• wherein the X-CAC comprises a first second-order control loop, and the Y-CAC comprises a second second-order control loop.