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Signal-level direct positioning method suitable for distributed networked radar

A technology of networked radar and positioning method, which is applied in the field of radar target positioning, and can solve the problem that the distributed networked radar system cannot be applied.

Active Publication Date: 2021-07-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, none of the above direct positioning methods can be applied to distributed networked radar systems

Method used

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  • Signal-level direct positioning method suitable for distributed networked radar
  • Signal-level direct positioning method suitable for distributed networked radar
  • Signal-level direct positioning method suitable for distributed networked radar

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Embodiment Construction

[0018] In order to describe content of the present invention conveniently, at first the following terms are explained:

[0019] Term 1: Distributed Networked Radar

[0020] The radar nodes are far enough apart from each other to realize multi-subarray focusing and positioning.

[0021] Term 2: Narrowband

[0022] The carrier frequency of the radiation source signal is much larger than the baseband bandwidth of the signal, so as to ensure that the signals observed by each array element in the array are the same at the same time.

[0023] Term 3: Far Field

[0024] The radiation source is far enough away from each radar node that the signal waveform can be approximated as a plane wave when it arrives at each radar node.

[0025] Term 4: Stories

[0026] Indicates that the observation signals of all array elements are sampled simultaneously at a certain moment.

[0027] like figure 1 As shown, the present invention provides a signal-level direct positioning method suitable ...

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Abstract

The invention discloses a signal-level direct positioning method suitable for a distributed networked radar, is applied to the field of radar target positioning, and aims to solve the technical problem that an existing direct positioning method is not suitable for a distributed networked radar system. The method comprises the following steps: constructing a sub-array for positioning based on the number and position of activated array element antennas which can be subjected to multi-degree-of-freedom self-adaptive adjustment; then, calculating the array manifold of the constructed sub-array; establishing a sub-array element element level joint likelihood function according to the array manifold of the sub-array; and finally, according to the established sub-array element element level joint likelihood function, finding out an optimal estimation value of a target position through a multi-dimensional grid search and Newton iteration optimization method, and realizing signal level direct positioning of the target in the distributed networked radar system.

Description

technical field [0001] The invention belongs to the field of radar target positioning, in particular to a direct positioning technology of distributed networked radar. Background technique [0002] Distributed networked radar is a new system based on wireless transmission. It is a networked deployment radar that uses multiple array radars to detect targets. Each array radar is a node on the distributed network, and each radar node is composed of some randomly distributed array element antennas. Different from conventional system radars with fixed array element antennas that aim to achieve a single function and task, distributed networked radar can perform multi-degree-of-freedom adaptive optimization on the number and position of active array element antennas according to the requirements of various tasks. It has the characteristics of flexibility, controllable scale, access and output, reorganization, strong mobility, strong anti-destruction ability, and strong anti-interf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/06G06F17/15G06F17/16
CPCG01S13/06G06F17/15G06F17/16
Inventor 易伟罗健周其玉张国鑫孔令讲杨雪亚王海环
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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