Unlock instant, AI-driven research and patent intelligence for your innovation.

Parameter-adjustable double-subspace signal detection method under signal mismatch

A signal detection and subspace technology, which is applied in the field of multi-channel active phased array radar, can solve the problem of insufficient detection of matrix value signals, and achieve the effect of robust detection or suppression and simple detection process

Pending Publication Date: 2020-05-08
AIR FORCE EARLY WARNING ACADEMY
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the matrix value signal cannot be detected properly when the signal is mismatched

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Parameter-adjustable double-subspace signal detection method under signal mismatch
  • Parameter-adjustable double-subspace signal detection method under signal mismatch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Preferred embodiments of the invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the invention, and are not intended to limit the protection scope of the invention.

[0021] see figure 1 As shown, a parameter-adjustable dual subspace signal detection method under signal mismatch includes the following steps: using training samples to form a sampling covariance matrix; using the obtained sampling covariance matrix to perform quasi-whitening on the data to be detected and the left signal matrix; according to The system needs to determine the adjustable parameters; use the adjustable parameters, the left signal matrix after quasi-whitening, the data to be detected and the right signal matrix to construct the detection statistics; calculate the detection statistics and compare them with the threshold, if the detection statistics are h...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a parameter-adjustable double-subspace signal detection method under signal mismatch. The parameter-adjustable double-subspace signal detection method comprises the following steps: forming a sampling covariance matrix by using a training sample; performing quasi-whitening on to-be-detected data and the left signal matrix by using the obtained sampling covariance matrix; determining adjustable parameters according to system requirements; constructing detection statistics by utilizing the adjustable parameters, the quasi-whitened left signal matrix, the to-be-detected data and the right signal matrix; calculating a detection statistic, comparing the detection statistic with a threshold, and if the detection statistic is higher than the threshold, judging that a targetexists; otherwise, judging that the target does not exist. Compared with a traditional detection method, the method designed by the invention can realize robust detection or suppression of mismatchedsignals by adjusting adjustable parameters, and has a flexible adjustable characteristic; in addition, the detection method has a constant false alarm characteristic, so that an additional constant false alarm processing step is not needed.

Description

technical field [0001] The invention relates to a parameter-adjustable twin-subspace signal detection method under signal mismatch, and is especially suitable for multi-channel active phased array radars. Background technique [0002] Object detection is one of the most basic and important functions of radar. At present, with the development of theory and the improvement of manufacturing technology, the resolution of radar is continuously improved, and the target echo often occupies multiple range resolution units, multiple Doppler resolution units, and even multiple azimuth resolution units. Correspondingly, the radar receiving data of a single target often exists in the form of dual subspace signals, which refer to rectangular-valued signals whose subspaces of rows and columns are known but whose coordinates are unknown. In addition, for phased array radar or multiple-input multiple-output (MIMO) radar, the multi-channel feature of data not only improves the degree of fre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06K9/00G06K9/62
CPCG06F2218/00G06F18/214
Inventor 刘维建王永良陈辉杜庆磊李槟槟
Owner AIR FORCE EARLY WARNING ACADEMY