Cross-polarization interference cancellation

Details Cross-polarization interference cancellation Cross-polarization interference cancellation

H - Electricity

04

B

325/120

H04B 1/10 (2006.01) H04B 7/00 (2006.01)

Patent

CA 1241998

- 22 - CROSS-POLARIZATION INTERFERENCE CANCELLATION Abstract A canceller for eliminating the cross- polarization interference in incoming signals having polarizations which are orthogonal to one another is proposed. Each incoming signal is coupled to an associated adaptive filter. Each filter output is then summed with an associated one of the incoming signals which has a polarization orthogonal to that of the filter input signal. The signal sums formed are the canceller output signals. Adjustment of the adaptive filters so as to cancel the cross-polarization interference in each received signal is made in response to the incoming signals and the canceller output signals at selected times. During these times, circuitry for adjusting the adaptive filters examines spectral tones formed by the incoming signals and the canceller output signals.

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