Cross-polarization canceler/equalizer

Details Cross-polarization canceler/equalizer Cross-polarization canceler/equalizer

1985-03-21

1986-12-23

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375102, 375103, 455295, H03H 730

Patent

active

046317341

ABSTRACT:
The present invention relates to a cross-polarization equalizer/canceler which simultaneously performs cross-polarization equalization/cancellation in a tapped delay line (TDL) matrix. More particularly, the present equalizer/canceler receives the first and second orthogonally polarized digital signals on separate paths which are each split into a straight through and cross-over paths that include a TDL matrix comprising a separate TDL, with a predetermined number of complex taps, in each of the paths. The individual complex taps are appropriately adjusted in response to control signals from a tap adjusting means which derives the appropriate control signals from current tap signals and computed gradients derived from a predetermined algorithm. Accurate data decisions, however, are not needed. The resultant TDL output signals in the merging straight-through and cross-over paths at the output of the TDL matrix are combined to converge each of the polarized signals for propagation along the straight-through paths.

REFERENCES:
patent: 3391339 (1968-07-01), Lynch
patent: 4053837 (1977-10-01), Ryan et al.
patent: 4074086 (1978-02-01), Falconer et al.
patent: 4112370 (1978-09-01), Monsen
patent: 4283795 (1981-08-01), Steinberger
patent: 4306307 (1981-12-01), Levy et al.
patent: 4321705 (1982-03-01), Namiki
patent: 4349889 (1982-09-01), van den Elzen et al.
patent: 4369519 (1983-01-01), Yuuki et al.
patent: 4412341 (1983-10-01), Gersho et al.
patent: 4479258 (1984-10-01), Namiki
patent: 4521878 (1985-06-01), Toyonaga
patent: 4577330 (1986-03-01), Kavehrad
Ehrenbard et al., Globecom '82, Miami, Fla., vol. 2, pp. D8.4.1-D8.4.5.
Van Gerwin et al., IEEE Jrnl. Sel. Areas Comm., vol. SAC-2, No. 2, Mar. 1984, pp. 314-323.
Sato, IEEE Trans. Comm., vol. COM-23, No. 6, Jun. 1975, pp. 679-682.
Mueller, BSTJ, vol. 58, No. 2, Feb. 1979, pp. 491-500.
Godard, IEEE Trans. Comm., vol. COM-28, No. 11, Nov. 1980, pp. 1867-1875.
Gersho et al., BSTJ, vol. 60, No. 11, Nov. 1981, pp. 1997-2021.
Mueller et al., BSTJ, vol. 60, No. 11, Nov. 1981, pp. 2023-2038.
Holte et al., IEEE Trans. Comm., vol. COM-29, No. 11, Nov. 1981, pp. 1573-1581.

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