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Gemini space signal detection method, system and device in partially homogeneous environment

A signal detection, uniform technology, applied in the field of signal detection

Active Publication Date: 2021-12-21
AIR FORCE EARLY WARNING ACADEMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the difficult problem of dual subspace signal detection when training samples are insufficient in partly uniform environments

Method used

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  • Gemini space signal detection method, system and device in partially homogeneous environment
  • Gemini space signal detection method, system and device in partially homogeneous environment
  • Gemini space signal detection method, system and device in partially homogeneous environment

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Embodiment 1

[0080] This embodiment provides a dual subspace signal detection method in a partially uniform environment, such as Figure 1-2 shown, including:

[0081] Step 1: Construct the signal left matrix, the signal right matrix, the data matrix to be detected and the training sample matrix,

[0082] Among them, the constructed signal left matrix, signal right matrix, data-to-be-tested matrix and training sample matrix respectively use the matrix , , and Indicates that the matrix , , and The dimensions of , , and ,in, , , represents the expanded dimension of the target, represents the number of training samples, Indicates the number of system channels;

[0083] Step 2: using the training sample matrix to construct a sampling covariance matrix and a whitening matrix, wherein the sampling covariance matrix and the whitening matrix constructed using the training sample matrix are respectively and ,in, and Denote the sampling covariance matrix and...

Embodiment 2

[0132] On the basis of the dual subspace signal detection method in the partially uniform environment provided by the above-mentioned embodiment 1, the present invention also provides a dual subspace signal detection device in a partially uniform environment that can be used to realize the above method, such as Figure 4 Shown is a schematic diagram of the device architecture of the embodiment of the present invention. The dual subspace signal detection device in a partially homogeneous environment in this embodiment includes one or more processors 21 and memory 22 . in, Figure 4 A processor 21 is taken as an example.

[0133] The processor 21 and the memory 22 may be connected via a bus or in other ways, Figure 4 Take connection via bus as an example.

[0134] The memory 22, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs and modules, such as implementing Dual subspace signa...

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Abstract

The present invention relates to a dual subspace signal detection method, system and device in a partially uniform environment. Firstly, construct a signal left matrix, a signal right matrix, a data matrix to be detected, and a training sample matrix; then use the training sample matrix to construct a sampling covariance matrix and a whitening matrix ; Then use the whitening matrix to whiten the data; then construct the orthogonal complement of the orthogonal projection matrix; then construct the intermediate variable matrix, and calculate the non-zero eigenvalues ​​of the intermediate variable matrix; then solve the correlation equation; then use the whitened The data matrix, the intermediate variable matrix, and the solution of the equation construct the detection statistics; then use the detection statistics and the false alarm probability value set by the system to determine the detection threshold; finally compare the detection statistics with the detection threshold, and determine whether the target exists. The detection method provided by the invention integrates clutter suppression, signal accumulation and constant false alarm characteristics, and improves the detection performance compared with the existing method.

Description

technical field [0001] The invention relates to the technical field of signal detection, in particular to a dual subspace signal detection method, system and device in a partially uniform environment. Background technique [0002] With the continuous increase in the number of radar airspace channels, the maturity of pulse coherent processing technology, and the improvement of radar distance resolution, radar can acquire data through multiple channels and multiple dimensions at the same time, and the corresponding radar data presents a matrix form and has In a specific structure, one of the data types is a double subspace signal, and this type of data exists in the form of a matrix. The row elements and column elements of the signal are located in the known subspace, but the corresponding coordinates are unknown. [0003] In addition, since the target is often located in a strong clutter background, the clutter power is several orders of magnitude higher than the target echo ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/04G01S7/02G06F17/16
CPCG01S13/04G01S7/02G06F17/16
Inventor 刘维建孙梦茹郝程鹏
Owner AIR FORCE EARLY WARNING ACADEMY
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