Title:
INTERFERENCE REJECTION GPS ANTENNA SYSTEM
Document Type and Number:
WIPO Patent Application WO2003007488
Kind Code:
A3
Abstract:
The present invention relates to a method and apparatus for selectively receiving a radio frequency (RF) signal which utilizes an array of antenna elements (101) for receiving the RF signal, a navigational controller (105) for determining a pointing vector from coordinate information, and beam-forming electronics (103) connected to the array of antenna elements (101) and the navigational controller (105) for forming reception lobes. This apparatus and method are particularly useful in the context of a Global Positioning System (GPS) for selectively receiving RF signals from GPS satellites to determine location and timing information. In one embodiment of the present invention, the phase of the elements of the array are adjusted to form selective reception lobes and constructively amplify signals within these reception lobes, increasing the signal-to-noise ratio (SNR) with respect to noise or interference signals outside the lobes. The reception lobes are advantageously positioned such that RF signals that are desired to be received are within the lobes according to the pointing vector determined by the navigational controller.
Inventors:
KIRCHOFER RICHARD
NIELSEN RAY
NIELSEN RAY
Application Number:
PCT/US2002/021440
Publication Date:
October 16, 2003
Filing Date:
July 09, 2002
Export Citation:
Assignee:
LOCKHEED CORP (US)
International Classes:
G01S19/21; G01S19/26; G01S19/28; G01S19/36; H01Q3/26; H01Q9/04; H01Q21/06; H01Q25/00; G01S1/00; (IPC1-7): G01S5/14
Domestic Patent References:
| WO1998016077A2 | 1998-04-16 |
Foreign References:
| US6166690A | 2000-12-26 | |||
| US6061019A | 2000-05-09 | |||
| US6023242A | 2000-02-08 | |||
| US5818385A | 1998-10-06 | |||
| US20020034967A1 | 2002-03-21 |
Other References:
See also references of EP 1412771A4
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