Jamming suppression of spread spectrum antenna/receiver systems

Details Jamming suppression of spread spectrum antenna/receiver systems Jamming suppression of spread spectrum antenna/receiver systems

1997-12-04

2000-10-31

Chin, Stephen

Pulse or digital communications

Spread spectrum

342 17, 342 18, 342 19, 342379, H04B 1500

Patent

active

061413712

ABSTRACT:
A jamming suppression system which includes a plurality of receivers for receiving electromagnetic radiations and a separate notch filter coupled to each receiver for filtering selected frequencies from electromagnetic radiations received by each of the receivers. In accordance with one embodiment of the invention, a spatial combiner responsive to the outputs of each of the notch filters extracts essentially jam-free information from the electromagnetic radiations. In accordance with a second embodiment of the invention, a plurality of spatial combiners, each responsive to the outputs of each of the notch filters, extracts essentially jam-free information from the electromagnetic radiations. The notch filters are adaptive notch filters for on-line selection of their filtering action. One of the notch filters is a master filter and the remainder of the notch filters are slave filters controlled by the master filter. In both embodiments, spatial filtering action is accomplished using a generalized sidelobe canceler that permits gain (relative to an isotropic antenna) to be preserved in the direction of one or more satellites while casting spatial mulls in the directions of inadvertent friendly or hostile jamming signals.

REFERENCES:
patent: 4170775 (1979-10-01), Masak et al.
patent: 4359736 (1982-11-01), Lewis
patent: 4673943 (1987-06-01), Hannan
patent: 4893128 (1990-01-01), Parl et al.
patent: 4901082 (1990-02-01), Schreiber et al.
patent: 5281930 (1994-01-01), Taromaru et al.
patent: 5299148 (1994-03-01), Gardner et al.
patent: 5359329 (1994-10-01), Lewis et al.
patent: 5485485 (1996-01-01), Briskman et al.
patent: 5640385 (1997-06-01), Long et al.
patent: 5712641 (1998-01-01), Casabona et al.
patent: 5990831 (1999-11-01), McDowell
Frost, "An Algorithm for Linearly Constrained Adaptive Array Processing", IEEE Proc. 60:926-935 (1972), pp. 238-247.
Griffiths, et al. "An Alternative Approach to Linearly Constrained Adaptive Beamforming", IEEE Transactions on Antennas and Propagation, vol. AP-30. No. 1, Jan. 1982, pp. 27-34.

Affiliated with

Also associated with

Rating

Jamming suppression of spread spectrum antenna/receiver systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Jamming suppression of spread spectrum antenna/receiver systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Jamming suppression of spread spectrum antenna/receiver systems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2062026