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Method and apparatus for echo detection

A technology of echo signal and signal, which is applied in the field of signal processing and echo location, and can solve problems such as high threshold and missing echo detection

Inactive Publication Date: 2018-10-16
メレクシステクノロジーズソシエテアノニム
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thresholds based on (scaled) averages can still be too high so that comparisons of test cells to actual thresholds will miss detection of echoes

Method used

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  • Method and apparatus for echo detection
  • Method and apparatus for echo detection
  • Method and apparatus for echo detection

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Embodiment Construction

[0055] The present invention will be described with respect to particular embodiments and with reference to certain drawings but the invention is not limited thereto but only by the claims. The drawings described are merely schematic and non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes. The dimensions and relative dimensions do not correspond to actual reductions for the practice of the invention.

[0056] The terms first, second etc. in the description and claims are used to distinguish between similar elements and not necessarily to describe an order, whether temporally, spatially, sequentially or in any other way. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embodiments of the invention described herein are capable of operation in other sequences than described or illustrated herein.

[0057] Furthermore, the terms top, below...

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Abstract

The invention provides a method and an apparatus for echo detection. The method for detecting and processing echo signals comprises detecting reflections of a transmitted signal as echo signals, obtaining digital magnitudes representative of an envelope of the echo signals over time, applying the digital magnitudes to a plurality of data storing cells, estimating a signal threshold by accumulatingthe digital magnitudes from a predetermined number of reference window cells (A1, A2) at each side of a predetermined cell-under-test in the plurality of data storing cells and multiplying the resulting accumulated signal by a predetermined first weight factor, thus obtaining an estimated signal threshold, comparing the threshold with the signal stored in the predetermined cell-under-test in theplurality of data storing cells, thus reducing chances of false detection.

Description

technical field [0001] The invention relates to the field of signal processing and echo location. More specifically, the present invention relates to a device and method for background noise and clutter elimination in a CFAR (Constant False Alarm Rate, Constant False Alarm Rate) circuit system for echo detection. Background technique [0002] Object detection systems such as radar, sonar or ultrasonic sensors typically include receivers that are adapted for detection of specific types of energy waves (eg electromagnetic waves such as radio waves, sound or ultrasonic waves, etc.). The energy waves are usually sent by the same sensor or another sensor synchronized with it, and in response to the transmitted signal, the interaction between the object and the energy waves produces echoes. A receiver is able to pick up this echo from the obstacle and decode it. A number of variables can be used to decode the signal, for example, the time period between the emission of the energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/539G01S7/41G01S7/48G01S13/931G01S15/931G01S17/931
CPCG01S7/414G01S7/4802G01S7/539G01S7/2922G01S13/5246G01S13/931G01S2015/932G01S15/931G01S7/5273G01S7/4873G01S2013/9323G01S2013/9324G01S17/931G01S7/2927
Inventor A·欧特S·格兰尤科斯
Owner メレクシステクノロジーズソシエテアノニム
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