Interference cancellation apparatus capable of adaptive equaliza

Details Interference cancellation apparatus capable of adaptive equaliza Interference cancellation apparatus capable of adaptive equaliza

1994-06-27

1996-06-04

Chin, Stephen

Pulse or digital communications

Receivers

Interference or noise reduction

375232, 375233, 4552781, H04B 710

Patent

active

055241255

ABSTRACT:
In an interference cancellation apparatus for use in combination with a diversity receiving system, the apparatus includes first and second transversal filters, first and second tap gain controllers, third transversal filter, third tap gain controller, decision unit, first error producing subtractor, and second subtractor which are operable as a first MMSE control loop for controlling first and second controllable tap gains and third controllable tap gains with reference to a first error signal. The apparatus further includes diversity combiner which is operable as a second MMSE control loop for controlling a combined signal with reference to a difference between the combined signal and a decision signal. An adaptive equalization and an interference cancellation are processed in parallel by the first and the second MMSE control loops, so that the control of the adaptive equalization and the interference cancellation can be converged at a high speed.

REFERENCES:
patent: 4281411 (1981-07-01), Bonn et al.
patent: 5349609 (1994-09-01), Tsujimoto
patent: 5425059 (1995-06-01), Tsujimoto
"MMSE Equalization of Interference on Fading Diversity Channels", by Peter Monsen, Transactions on Communications, Vo. COM-32, No. 1, Jan. 1984.
"Adaptive Matched Filter and its Significance to Anti-Multipath Fading", by Kojiro Watanabe, C&C Systems Research Laboratories pp. 46.21.1-46.2.5.

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