Technologies


Integrated Adaptive Antenna Array and Adaptive Locally-Optimum Detection Processor

Reference#: P01652


Adaptive Antenna Arraying (AAA) and Adaptive Locally-Optimum Detection (ALOD) are two complementary signal-processing techniques use for detecting weak signals (such as radio or radar) in the presence of strong man-made interference or jamming. The system is primarily designed for incorporation within systems using Direct Sequence Spread Spectrum signals, such as Global Positioning System (GPS) signals. In a preferred embodiment the inventive system is incorporated within a conventional GPS receiver, which tends to be vulnerable to jamming by interference signals. Fields of application for this technology may include Electronics System Integrators, Antigay Communication Systems, Digital Signal-Processing Software or Hardware, Integration, Test and Development Engineering Services to support development, deployment and evaluation, Radar and Radio Navigation.

The present invention combines the advantages of Adaptive Antenna Arraying (AAA) and Adaptive Locally-Optimum Detection (ALOD), as well as Adaptive Filtering, signal process techniques and achieves the capabilities of all these techniques. It represents the first successful integrated system for performing signal process techniques associated with an AAA system and an ALOD system. The system automatically distributes interference signals among AAA and ALOC sub-systems according to which sub-system's algorithms can provide a more optimum suppression of the interference signals. The system permits an Adaptive Antenna Array with a given number of antenna elements to effectively suppress a larger number of interferers than it otherwise could, and to adapt more quickly to a rapidly changing interference scenario. For an Adaptive Antenna Array with a small number of antenna elements, e.g., two to four, the system provides added interference suppression capability that could be done by adding antenna elements to the adaptive antenna array. The system is primarily designed for incorporation within systems using Direct Sequence Spread Spectrum signals, such as Global Positioning System (GPS) signals. In a preferred embodiment the inventive system is incorporated within a conventional GPS receiver which tends to be vulnerable to jamming by interference signals.

Patent Status: U.S. patent(s) 6735427 issued.

*US Granted Patent #6735427 Issued 5/11/2004 Expires 12/19/2021

CONTACT:
Mr. J. E. Dietz
Phone: (443) 778-8782
ott-techmanager5@jhuapl.edu