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Method and apparatus for all-polarization direction finding

a technology of all-polarization direction and method, applied in the field of signal tracking, can solve the problems of increasing system cost and complexity, and the inability to track signals, and achieve the effect of easy calculation

Inactive Publication Date: 2009-01-15
L 3 COMM INTEGRATED SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables accurate calculation of angles of arrival for signals with any polarization, improving signal tracking capabilities and reducing system complexity and cost by using blind signal extraction algorithms and all-polarization cost functions.

Problems solved by technology

Some of these methods include utilizing Global Position System (GPS) elements that must be coupled with signal emitters to determine geolocations, thereby increasing system cost and complexity.
Unfortunately, developed methods of calculating AOA require signals to be exclusively vertically or horizontally polarized or require the use of algorithms such as the multiple signal classification (MUSIC) algorithm.
As signals are often not exclusively vertically or horizontally polarized and the MUSIC algorithm requires knowledge of how many signals are in the environment and is generally inoperable to utilize measurements provided by blind signal extraction algorithms, signal tracking methods are often inhibited when faced with diversely polarized signals.

Method used

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  • Method and apparatus for all-polarization direction finding
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  • Method and apparatus for all-polarization direction finding

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Embodiment Construction

[0022]The following detailed description of the invention references the accompanying drawings that illustrate specific embodiments in which the invention can be practiced. The embodiments are intended to describe aspects of the invention in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments can be utilized and changes can be made without departing from the scope of the present invention. The following detailed description is, therefore, not to be taken in a limiting sense. The scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled.

[0023]Methods consistent with the present teachings are especially well-suited for implementation by a computing element 10, as illustrated in FIG. 1. The computing element 10 may be a part of a communications network 12 that enables various devices to exchange information and data. The computing element 10 may include ...

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Abstract

Embodiments of the present invention provide a method and apparatus for all-polarization direction finding. The method and apparatus generally include acquiring measurements at least partially corresponding to an emitted signal and generated utilizing a blind signal extraction algorithm, forming an all-polarization cost function utilizing the acquired measurements, and determining an angle of arrival for the emitted signal utilizing the formed all-polarization cost function. Such a configuration enables angles of arrivals to be easily determined for signals having any polarization without using a multiple signal classification (MUSIC) algorithm.

Description

RELATED APPLICATION[0001]The present application is a continuation patent application and claims priority benefit, with regard to all common subject matter, of earlier-filed U.S. non-provisional patent applications titled “METHOD AND APPARATUS FOR ALL-POLARIZATION DIRECTION FINDING”, Ser. No. 11 / 368,155, filed Mar. 3, 2006. The identified earlier-filed application is hereby incorporated by reference in its entirety into the present application.BACKGROUND[0002]1. Field[0003]The present invention relates to signal tracking. More particularly, the invention relates to a method and apparatus for all-polarization direction finding that utilizes signal measurements provided by a blind signal extraction algorithm.[0004]2. Related Art[0005]The ability to determine the source geolocation of emitted signals is becoming increasingly important as the use of wireless communications devices becomes commonplace throughout the world. For example, the U.S. Federal Communications Commission Enhanced ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01S5/02G01S19/09G01S19/19G01S19/44G01S19/46
CPCH01Q3/267G01S3/74
Inventor THORNTON, STEVEN D.CLOSE, DENNIS J.KARGEL, MARK L.STANNERS, STEVEN P.
Owner L 3 COMM INTEGRATED SYST