Apparatus and method for employing adaptive interference cancell

Details Apparatus and method for employing adaptive interference cancell Apparatus and method for employing adaptive interference cancell

1987-02-12

1995-08-08

Swann, Tod R.

Communications: directive radio wave systems and devices (e.g.,

Radar ew

Eccm

342 19, 342375, 4552781, G01S 736

Patent

active

054403081

ABSTRACT:
A new adaptive interference technique is disclosed which not only increases the cancellation bandwidth but also reduces the convergence time for the adaptive process. This new technique departs from the prior art in adaptive interference cancellation in that an estimate of the interference arrival direction coupled with a predetermined antenna response is used to establish the weight settings in the adaptive cancellation circuitry. This circuitry incorporates variable true time delay components to achieve interference cancellation over a broad bandwidth with a rapid convergence time.

REFERENCES:
patent: 3177489 (1965-04-01), Saltzberg
patent: 3870966 (1975-03-01), Miller
patent: 4234940 (1980-11-01), Iinuma
patent: 4268829 (1981-04-01), Baurle et al.
patent: 4280128 (1981-07-01), Masak
patent: 4298873 (1981-11-01), Roberts
"Analysis of Tapped Delay Line Processing for Adaptive Sidelobe Cancelation"; Larry Bowers et al., 1980 Int. Symp. Digest Antennas & Propagation.
Lambert, Rudduck and Lee, Proceedings, Antenna Measurement Techniques Assn. Meeting, Sep. 28-Oct. 2, 1987, pp. 44-49.
Shan and Kailath, IEEE Transctions on Acoustics, Speech and Signal Processing, vol. ASSP-33, No. 3, Jun. 1985.

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