A Signal-Level Direct Location Method for Distributed Networked Radar
A technology of networked radar and positioning method, which is applied in the field of radar target positioning, can solve the problems that the distributed networked radar system cannot be applied, and achieve anti-destruction ability and strong anti-jamming ability, controllable array scale, and strong reorganization ability Effect
Active Publication Date: 2022-07-22
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Therefore, none of the above direct positioning methods can be applied to distributed networked radar systems
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[0018] For the convenience of describing the content of the present invention, the following terms are first explained:
[0019] Term 1: Distributed Networked Radar
[0020] The radar nodes are far enough apart from each other to achieve multi-subarray focus positioning.
[0021] Term 2: Narrowband
[0022] The carrier frequency of the radiation source signal is much larger than the baseband bandwidth of the signal to ensure that the signals observed by each array element in the array at the same time are the same.
[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 reaches each radar node.
[0025] Term 4: Snapshots
[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 for distribute...
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The invention discloses a signal-level direct positioning method suitable for distributed networked radar, which is applied to the field of radar target positioning, aiming at the technical problem that the existing direct positioning methods cannot be applied to the distributed networked radar system; the invention is based on the The number and position of the active array element antennas that can be adaptively adjusted with multiple degrees of freedom are used to construct a sub-array for positioning; then the array manifold of the constructed sub-array is calculated; according to the array manifold of the sub-array, a sub-array is established Element-level joint likelihood function; finally, according to the established sub-array element-element-level joint likelihood function, the optimal estimated value of the target position is found through multi-dimensional grid search and Newton iterative optimization method, and a distributed networked radar system is realized. The signal level of the target is located directly.
Description
technical field [0001] The invention belongs to the field of radar target positioning, in particular to a direct positioning technology of a distributed networked radar. Background technique [0002] Distributed networked radar is a new radar system based on wireless transmission. It is a mesh deployment radar that uses multiple array radars to network to detect targets. Each array radar is a node on a distributed network, and each radar node is composed of some randomly distributed array element antennas. Different from conventional radars with fixed array element antennas and aiming at realizing 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 various task requirements. It has the characteristics of flexibility and change, controllable scale, can be connected and connected, can be reorganized, strong mobility, strong anti-destroy abilit...
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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