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Target direct detection and tracking method based on passive external radiation source radar

An external radiation source radar and target technology, which is applied in the field of target direct detection and tracking based on passive external radiation source radar, can solve the problem that the estimation error cannot be repaired, and achieves the effect of avoiding intermediate errors, good effect and strong robustness.

Active Publication Date: 2022-07-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the traditional process often makes a hard decision at the very beginning of the detection process. The estimation error generated by this method cannot be repaired in the next stage, and it is difficult to track the target in real time and effectively in complex scenes.

Method used

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  • Target direct detection and tracking method based on passive external radiation source radar
  • Target direct detection and tracking method based on passive external radiation source radar
  • Target direct detection and tracking method based on passive external radiation source radar

Examples

Experimental program
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Embodiment

[0067] In this example, MATLAB is used to verify the above-mentioned passive MIMO radar joint detection and tracking algorithm scheme. For the sake of simplicity, the following assumptions are made on the algorithm model:

[0068] The effectiveness of the present invention will be described below with reference to the accompanying drawings and simulation examples.

[0069] Simulation conditions and parameters

[0070] Simulation environment: For illustration purposes, consider a representative 2D scenario, assuming a passive MIMO radar network with 3 transmitters r i are located at [100, 1000], [400, 1500], [700, 1500] (m), three receivers d j are located at [0,-500], [500,-800], [1000,-500](m) respectively, and the target state vector is The initial state is x 0 =[0(m), 0(m), 10(m / s), 17(m / s)]. Assume the total observation time K=100s. The linear Gaussian equation of motion of the target is x k =Fx k-1 +Gw k ,in

[0071]

[0072] Where △=1s is the sampling period...

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Abstract

The invention provides a target direct detection and tracking method based on a passive external radiation source radar, and aims to solve the problem of joint detection and tracking of a single target under the condition of unknown target appearance time by starting from data received by a passive MIMO radar receiver. According to the method, MIMO radar signals are divided into reference signals and monitoring signals, a likelihood function of a Bernoulli filter is designed based on the GLRT detector principle of a passive MIMO radar, and the likelihood function is constructed by integrating two paths of signals of all receivers in a centralized mode. The whole set of system effectively reduces intermediate errors of a traditional two-step method, can achieve target tracking under a lower signal-to-noise ratio, has good performance, adaptability to the environment and robustness, and can meet design requirements in engineering.

Description

technical field [0001] The invention belongs to the technical field of electronic countermeasures, and in particular relates to a method for direct detection and tracking of a target based on a passive external radiation source radar. Background technique [0002] The traditional passive radar target tracking method is mainly divided into two steps. First, parameters such as time delay (TOA), Doppler frequency (FOA) and / or angle of arrival (DOA) generated by the suspected target are estimated from the received signal. Then select appropriate filters to use these intermediate parameters as measurements to estimate the number and state of targets in the monitoring area. At the same time, the traditional process often makes a hard decision at the very beginning of the detection process. The estimation error generated by this method cannot be repaired in the next stage, and it is difficult to effectively track the target in real time in complex scenes. [0003] In recent years,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/66G01S13/04H03H17/02G06F17/14
CPCG01S13/66G01S13/04H03H17/0255G06F17/142
Inventor 陈奕琪许文杰李改有高林魏平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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