H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/120, 325/72
H04B 1/10 (2006.01) H04B 7/00 (2006.01)
Patent
CA 1223925
- 17 - A CROSS-POLARIZATION INTERFERENCE CANCELLATION ARRANGEMENT FOR DIGITAL RADIO CHANNELS Abstract The present invention relates to a cross- polarization cancellation arrangement for digital radio channels wherein the cancellation arrangement comprises a canceller section and an equalizer section in cascade which operate at baseband. The canceller section includes both main-lobe estimator means and detection circuits. The estimator means provides a preliminary estimate of the main lobe of the pulse response in each of the two received orthogonally polarized signals. The detection circuits take each of the estimator means output signals, relating to each received polarized signal, and generates therefrom error control signals for adaptively updating the main lobe estimate signals from the estimator means and also to provide an output signal which is used to cancel the interferer main lobe in the received oppositely polarized signal. The equalizer section then mitigates intersymbol and cross-rail interference in each of the orthogonally received signals.
479400
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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