Combined cross polarization interference cancellation and inters

Details Combined cross polarization interference cancellation and inters Combined cross polarization interference cancellation and inters

1985-08-28

1987-02-17

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 15, 375101, 455295, H04B 112

Patent

active

046445625

ABSTRACT:
Data-aided equalization and cancellation in digital data transmission over dually polarized fading radio channels is disclosed. The present invention uses decision feedback structures with finite-tap transversal filters. Subject to the assumption that some past and/or future data symbols are correctly detected, formulas and algorithms for evaluating the least mean-square error for different structures are disclosed. In a sequence of curves, the performance of various structures for a particular propagation model and several fading events are evaluated and compared.

REFERENCES:
patent: 4053837 (1977-10-01), Ryan et al.
patent: 4181888 (1980-01-01), Falconer
patent: 4321705 (1982-03-01), Namiki
patent: 4367555 (1983-01-01), Namiki et al.
patent: 4422175 (1983-12-01), Bingham et al.
patent: 4438530 (1984-03-01), Steinberger
patent: 4577330 (1986-03-01), Kavehrad
patent: 4606054 (1986-08-01), Amitay et al.
"Adaptive Cross-Polarization Interference Cancellation for Dual-Polarized M-QAM Signals" by M. Kavehrad, GlobeCom-83 Proceedings, San Diego, Calif., Nov. 1983.
"Adaptive Decision Feedback Cancellation of Intersymbol Interference Over Multipath Fading Radio Channels, by M. Kavehrad, 1983 IEEE, 83CH1874-7/83/000-0869, C8.5.1-C8.5.3, pp. 869-871.

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