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A Direct Radiation Source Localization Method Based on Global Narrowband Model under Sparse Bayesian Framework

A sparse Bayesian, positioning method technology, applied in the direction of positioning, instruments, measuring devices, etc., can solve the problem of low probability of positioning success, and achieve the effect of improving the probability of positioning success

Active Publication Date: 2021-09-07
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

The main limitation of existing sparse positioning algorithms is that the probability of successful positioning is not high

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  • A Direct Radiation Source Localization Method Based on Global Narrowband Model under Sparse Bayesian Framework
  • A Direct Radiation Source Localization Method Based on Global Narrowband Model under Sparse Bayesian Framework
  • A Direct Radiation Source Localization Method Based on Global Narrowband Model under Sparse Bayesian Framework

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Embodiment 1

[0073] A direct localization method for radiation sources based on a global narrowband model under a sparse Bayesian framework, such as figure 1 As shown, the direct positioning method of the radiation source includes:

[0074] Step 1: For L discrete base stations and N narrowband radiation sources in the plane, model the received data of the global array under the condition that the radiation source signal has narrowband characteristics for the global array composed of all base stations, where each base station Linearly configure M sensors, and have M≥2, L≥2, 1≤N≤ML-1; then perform block sparse Bayesian extension on the received data model of the global array to obtain the received data of the global array sparse model;

[0075] Step 2: Obtain the posterior update of the signal statistical parameters according to the Gaussian statistical characteristics of the signal;

[0076] Step 3: Use the marginal probability density integral to obtain the parameter estimation cost func...

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Abstract

The invention proposes a radiation source direct positioning method based on a global narrowband model under a sparse Bayesian framework, and belongs to the technical field of radiation source positioning technology. The method for directly locating the radiation source includes step 1, sparse modeling of data received by the global array; step 2, posterior update of signal statistical parameters; and step 3, calculation of model parameters. This method is suitable for the condition that the radiation source signal has a narrow-band characteristic for the global array composed of all base stations, and only needs to use the angle information of the signal in the processing, without needing to synchronize the reception of each station. Compared with the traditional positioning method, the direct positioning method of the radiation source proposed by the present invention does not need to carry out data association and does not need to know the number of information sources; compared with the sparse positioning method, the proposed method of the present invention can obtain a higher probability of successful positioning.

Description

technical field [0001] The invention relates to a radiation source direct positioning method based on a global narrowband model under a sparse Bayesian framework, and belongs to the technical field of radiation source positioning technology. Background technique [0002] Radiation source location technology is an important research topic in the fields of radar, sonar and wireless communication. The traditional radiation source localization method is divided into two steps: measurement quantity estimation (including angle of arrival, time difference of arrival, etc.) and target position calculation. Its main disadvantage is that an additional data association step is required. Therefore, a class of algorithms that directly use the received data to obtain target position estimates has gradually emerged. Most of the existing direct localization algorithms use the classic spectrum estimation technique, and its limitation is that the number of targets needs to be known. The mai...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/02
CPCG01S5/0278
Inventor 毛兴鹏陈敏求赵春雷
Owner HARBIN INST OF TECH