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Negative pseudo-range processing with multi-static fmcw radars

A multi-static, radar technology applied in the direction of reflection/reradiation of radio waves, instruments, measuring devices, etc.

Active Publication Date: 2015-12-23
CODAR OCEAN SENSORS LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While thus bistatically operating, each radar continues to receive echoes simultaneously in its normal backscatter mode

Method used

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  • Negative pseudo-range processing with multi-static fmcw radars
  • Negative pseudo-range processing with multi-static fmcw radars
  • Negative pseudo-range processing with multi-static fmcw radars

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Embodiment Construction

[0046] Reference will now be made in detail to certain embodiments of the invention, including the best modes contemplated by the inventors for carrying out the invention. Examples of these specific embodiments are illustrated in the accompanying drawings. While the invention has been described in conjunction with these specific embodiments, it is to be understood that the invention is not intended to be limited to the described embodiments. On the contrary, the intention is to cover alternatives, modifications and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.

[0047] The present invention is a novel extension of bistatic or multistatic FMCW radars operating on or near bodies of water to map surface currents or detect ship targets. Multistatic radar operation means the combination of bistatic pairings of "n" radars. These are co-synchronized so that their signals are coherent.

[0048] The present invention p...

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Abstract

Provided is a multi-static radar system for monitoring a water surface target. The multi-static radar system comprises a first radar and a second radar, a static machine, and a signal processor. The radars may be located on an independent position and synchronized by using a timing signal. The static machine may be configured to determine a start point and an end point of a radio frequency signal modulation for each radar by using the timing signal. A concept of a negative pseudo-distance is provided, so the modulation start point is formed to enable pseudo-negative time delay in a half of radar receivers to double multi-static echo detection. The signal processor may be configured to simultaneously receive and process the echo of the radar signal received from the radars to determine location and velocity vectors of the monitored water surface target.

Description

[0001] Copyright Notice [0002] Portions of the disclosure of this patent document contain material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or patent disclosure as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyrights. Background technique [0003] Low frequency backscatter radar systems operating in the MF, HF, VHF and UHF bands are widely used for mapping and monitoring surface targets, eg currents, ships and waves on oceans or along rivers. About 150 of these HF / VHF radars are currently operating along the US coast as part of the National Oceanic and Atmospheric Administration's (NOAA) Integrated Ocean Observing System (IOOS) project, and the systems export data to public websites (hfradar.ndbc.noaa.gov). Several other countries now have such radar networks on their shores. In all, at least 400 of these oceanographic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88
CPCG01S7/35G01S13/003G01S13/874G01S13/12G01S13/34G01S13/89G01S13/878
Inventor 威廉·C·雷克托唐纳德·E·巴里克贝琳达·J·利帕小赫克托·阿圭勒
Owner CODAR OCEAN SENSORS LTD
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