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Distributed opportunistic array radar time synchronization method

A time synchronization and distributed technology, which is applied in the reflection/re-radiation of radio waves, satellite radio beacon positioning system, and the use of re-radiation, etc., can solve the inconsistency of clock bias correction, the time synchronization accuracy is not high enough, and affect the timing accuracy and other problems to achieve the effect of eliminating systematic deviation and realizing high-precision time synchronization

Inactive Publication Date: 2019-03-01
CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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Problems solved by technology

Because the distributed opportunistic array system has a large number of nodes and can be expanded infinitely, due to different geographical locations and different occlusion situations, the participating satellite constellations for positioning and timing calculation must be different, and different satellite constellations will lead to different PDOP (plane Inconsistencies in the single-point positioning results will inevitably lead to inconsistencies in the corrections of the local clock bias, thus affecting the timing accuracy
[0008] Therefore, the problem existing in the existing technology is: due to different satellite constellations, the single-point positioning method leads to insufficient time synchronization accuracy, which cannot meet the time synchronization requirements of distributed opportunistic array radars

Method used

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  • Distributed opportunistic array radar time synchronization method

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the drawings and specific embodiments of the specification.

[0031] Such as figure 1 with figure 2 As shown, a distributed opportunistic array radar time synchronization method, the distributed opportunistic array radar includes multiple chance sub-arrays, and each chance sub-array serves as a node. The steps include:

[0032] Time synchronization within the group: The nodes in the group use single-point positioning and single-point absolute timing to determine the common-view satellites in the group, and use the common-view satellites in the group as a reference to re-position and absolute timing to realize each group in the group. Node time synchronization;

[0033] Intra-regional time synchronization: The regional processing center uses a common-view satellite in the group as the common-view satellite. The nodes in each group process and calculate the radio frequency signals of the common-view sat...

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Abstract

The invention discloses a distributed opportunistic array radar time synchronization method. According to the method, in a group, intra-group time synchronization is performed with co-view satellitesin the group adopted as references, so that systematic deviation between intra-group nodes can be eliminated; in a region, one intra-group co-view satellite is adopted as a common regional co-view satellite, so that the systemic deviation between inter-group nodes can be eliminated; and the high-precision time synchronization of each node in the entire region is achieved. In a distributed opportunistic array radar, each opportunistic subarray can be used as a node, and the high-precision time synchronization of the entire distributed opportunistic array radar is realized with the time synchronization method of the present invention.

Description

Technical field [0001] The invention relates to the technical field of distributed opportunistic array radars, in particular to a time synchronization method for distributed opportunistic array radars. Background technique [0002] Distributed opportunistic array radar is a new radar system, which includes: an information integrated processor, used to control the transmission beam of the opportunistic sub-array, the receiver will collect the echo information of the sub-array, and comprehensively process the echo information; The chance sub-matrix is ​​used to form a transmission beam according to the control information sent by the information integrated processor, and feed back the received echo information to the information integrated processor; the multiple chance sub-arrays are connected to the information integrated processor through a communication network, The information integrated processor is used to connect with a radar display device, and the opportunistic sub-arrays...

Claims

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Application Information

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IPC IPC(8): G01S13/00G01S19/25
CPCG01S13/003G01S19/256
Inventor 龙伟军王建明
Owner CHINA ELECTRONICS TECH GRP CORP NO 14 RES INST
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