Method and device for obtaining reference noise floor, target detection method, target detection device and radar system

Abstract

The embodiment of the invention discloses a method and device for obtaining a reference noise floor, a target detection method, a target detection device and a radar system. The method comprises the steps of carrying out RFFT processing based on a time domain signal matrix obtained through the sampling of a radar original signal in a radar digital signal processing process to obtain distance dimension data, and calculating a reference noise floor according to the distance dimension data. The reference noise floor obtained through calculation is close to or even can be directly regarded as a real noise floor compared with a traditional reference noise floor, and then the defects that due to the fact that the difference between the obtained reference noise floor and the real noise floor is large, a detector is difficult to judge whether a target exists or not, and missed detection or false alarm is caused are effectively avoided. Meanwhile, the reference noise floor obtained by the embodiment of the invention has very stable output characteristics, and the accuracy of target detection of the detector can be further improved.

Description

Technical field [0001] The present application relates to the field of radar digital signal processing, and more particularly to a method and apparatus, a target detection method, a target detecting device, a radar system for obtaining a reference noise substrate. Background technique [0002] At present, as the most important part of the radar digital signal processing, it is generally targeted using CFAR (Constantfalse Alarm Rate, Hengxua Detection) technology. Since the current CFAR technology is based on a uniform reference noise base (NOISE Floor, it can be referred to as a noise background) to target target detection, in the actual application environment, the grid point where the target is currently detected (Cellunder Test, referred to as CUT The noise base is not all uniform, so the industry often uses a background noise such as SOCA-CFAR, OS-CFAR or the like to estimate the reference value of the detector to enhance the accuracy of the target detection. [0003] However...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the embodiment of the present application provides a method and device for obtaining a reference noise floor, a target detection method, a target detection device, and a radar system, so as to effectively avoid the large difference between the obtained reference noise floor and the real noise floor It makes it difficult for the detector to judge whether the target exists, resulting in defects such as missed detection or false alarm

Images