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Method and system for detecting radar signals

a radar signal and detection method technology, applied in the field of radio communication technology, can solve the problems of radio communication receivers having trouble distinguishing a real radar pulse sequence, radio communication receivers cannot use periodicity, and communication signal collisions are more difficult to distinguish

Inactive Publication Date: 2012-09-13
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]It is an object of the invention to provide a method and system that obviates or mitigates at least one of the disadvantages of existing systems.

Problems solved by technology

These longer pulses are about the same length as the typical radio communications signals making more difficult the distinction between communications signal collisions and the RADAR signals.
These false signals occur due to RF noise or the transmissions from other radio communications devices in the band, and radio communications receivers have trouble distinguishing a real RADAR pulse sequence from this other noise and activity.
However, many RADARS use a variety of pulse formats, durations and repetition intervals either for operational reasons or a desire to be covert (i.e. hard to detect).
Hence the radio communications receiver cannot use the periodicity and limited range of pulse widths as a reliable means to distinguish these RADAR signals

Method used

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Embodiment Construction

[0024]Embodiments of the present invention describe using radio communications systems and RADAR systems. The radio communications systems may include, but not limited to, Radio Local Area Network (RLAN) communications systems which are also called Wireless Local Area Networks (WLANs). The embodiments of the present invention can be applicable to any communications network other than RLAN, which uses a certain frequency band / spectrum and may share that frequency band / spectrum with the RADAR system. The radio communications systems may be used for communications among fixed and mobile devices.

[0025]FIG. 1 illustrates a RADAR system 10 and a radio communications network 2 to which RADAR signal detection in accordance with an embodiment of the present invention is applied. In FIG. 1, a group of radio communications nodes 4A-4H is shown as forming the radio communications network 2. The radio communications nodes 4A-4H may be RLAN devices operating to form a radio communications system....

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Abstract

A method and system for detecting RADAR signals in a radio communications system is provided. A detection system includes a pulse examination. Based on the result from the examination / analysis, a RADAR pulse is detected. The examination / analysis may include a correlator for correlating received pulses with themselves or samples previously obtained.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority of U.S. patent provisional application No. 60 / 680, 467, filed on May 12, 2005, the full disclosures of which is incorporated herein by reference.FIELD OF INVENTION[0002]The present invention generally relates to radio communication technology, and more specifically to detecting radar signals.BACKGROUND OF THE INVENTION[0003]Some radio systems, including the 5 GHz Radio Local Area Networks (RLANs), sometimes referred to as Wireless Local Area Networks (WLANs), use radio spectrum bands that are shared with other services including RADARS. This sharing requires that the radio communications equipment must detect the operation of nearby RADAR systems, and stop using the channels if a RADAR signal is detected. The band sharing procedures are defined in the ITU-R WRC-03 Resolution 229 and ITU-R Recommendation M1652. These texts are supplemented by additional national and regional regulations for sharing a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G01S7/40
CPCG01S7/021H04W16/14H04K2203/36H04K3/226H04K3/822H04K3/224
Inventor STEER, DAVIDSMITH, ADRIAN
Owner APPLE INC
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