Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1995-11-08
1999-06-29
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342357, H01Q 322, H01Q 324, H01Q 326
Patent
active
059174463
ABSTRACT:
A receiver system on a mobile host vehicle platform includes an inertial sensor embedded in an antenna groundplane that supports an array of antenna elements. The beamformer within the receiver system determines the beamforming weights by incorporating inertially-generated signals representative of the attitude of the receiver system and location data identifying the location of GPS satellites. As the host vehicle moves, the beamformer generates the appropriate gain pattern based on the inertial data of the current attitude and the GPS location data. The beamformer, in particular, performs a spatial filtering function that is characterized by high-gain profiles in the direction of transmission of selected ones of the GPS terminals, thereby effectively suppressing signals originating from jammers and other sources of RFI.
REFERENCES:
patent: 5416712 (1995-05-01), Geier et al.
patent: 5534875 (1996-07-01), Diefes et al.
Van Veen, et al (Apr. 1988) "Beamforming: A Versatile Approach to Spatial Filtering," IEEE ASSP Magazine, pp. 4-24.
Blum Theodore M.
The Charles Stark Draper Laboratory Inc.
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