Multi-target tracking method of time-division multi-frequency external radiation source radar
An external radiation source radar and multi-target tracking technology, which is applied in the field of radar data processing, can solve problems such as high cost and increase system complexity, and achieve the effects of reducing the amount of calculation, meeting real-time work requirements, and eliminating false targets
Active Publication Date: 2020-01-24
WUHAN UNIV
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However, the establishment of multiple receiving stations is not only expensive, but also the communication between multiple receiving stations increases the complexity of the system
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[0048] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.
[0049] please see figure 1 , the multi-target tracking method of time-division multi-frequency external radiation source radar proposed by the present invention comprises the following steps:
[0050] Step 1: Correlate and filter the bistatic measurement data that is effectively sent and received at the current moment with the extrapolated bistatic track, obtain the latest status of the extrapolated bistatic track, and update the uncorrelated extrapolated bistatic track start from the bistatic measurement data;
[0051] Step 2: For the inbound extrapolated ...
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The invention discloses a multi-target tracking method of a time-division multi-frequency external radiation source radar, wherein a time-division multi-frequency system uses a receiving station to sequentially acquire target echo signals of a plurality of transmitting stations with different frequency. The method comprises extrapolated bistatic tracking and Cartesian tracking, wherein a large number of false alarms are removed, and the calculation amount of the subsequent processing are reduced by the extrapolated bistatic tracking on one hand; and on the other hand, based on an extrapolatedbistatic track state, the time alignment of the extrapolated bistatic tracks of different transmitting stations is realized by using the predictive ability of a Kalman filter. The Cartesian tracking is divided into the beginning of a Cartesian track and the maintenance of the Cartesian track, the original measurement associated with the extrapolated bistatic tracking is applied to the maintenanceof the Cartesian track, and the latest states of the remaining extrapolated bistatic tracks not associated with the original measurement are applied to the beginning of the Cartesian track. By adopting the method disclosed by the invention, the complexity of the system hardware is simplified, and at the same time, the tracking performance is close to the fusion result of a multiple-receiving and multiple-sending system, and the method has promotion and application values.
Description
technical field [0001] The invention belongs to the field of radar data processing, and relates to a multi-sensor multi-target tracking method, in particular to a multi-target tracking method for a time-division multi-frequency external radiation source radar. Background technique [0002] External radiation source radar (also known as passive radar) is a radar system that uses electromagnetic signals emitted by a third party for target detection. it is good. When the traditional bistatic external radiation source radar detects the target, the receiving station only works on one frequency, the information obtained is relatively simple, and the accuracy of angle measurement is low (some systems do not even have the ability to measure angle), which leads to its inaccuracy in positioning and tracking. Aspect precision is limited. [0003] On the other hand, with the large-scale promotion of digital broadcasting and television, two networking technologies have been developed, ...
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IPC IPC(8): G01S13/72G01S7/41G01S7/292G01S7/35
CPCG01S13/726G01S7/415G01S7/2923G01S7/354Y02A90/10
Inventor 万显荣吕敏易建新程丰
Owner WUHAN UNIV