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A Direction Finding Method for Unmanned Platform Based on Four Antennas

An unmanned platform, four-antenna technology, used in diversity/multi-antenna systems, direction-determining directional devices, radio wave measurement systems, etc., and can solve problems such as complex structures

Active Publication Date: 2022-03-15
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

Feng Jianguang (Feng Jianguang. Transponder Antenna Analysis of Rotary Aircraft [J] National Antenna Annual Conference Proceedings, 2009) proposed a four-antenna diversity working mode, but the design idea is that four phased array antennas constitute an antenna array. complex structure

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  • A Direction Finding Method for Unmanned Platform Based on Four Antennas
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  • A Direction Finding Method for Unmanned Platform Based on Four Antennas

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0017] The invention adopts four antennas to receive to ensure communication waveform interception and plane two-dimensional direction finding; uses two sets of antennas to compare and judge to ensure optimal direction finding accuracy; adopts an information cooperative processing mechanism with the platform inertial navigation module to ensure direction finding brought about by platform maneuvering Errors are compensated in real time.

[0018] The four-antenna design of the present invention is as figure 1 As shown, A1 and A2 constitute the first group of antennas, and B1 and B2 constitute the second group of antennas. The materials and design specifications of the four antennas are the same, and the specific design dimensions can be appropriately modified according to the...

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Abstract

The invention provides a direction finding algorithm for an unmanned platform based on four antennas. Based on the physical waveform of communication transmission, two sets of binary antennas perpendicular to each other are used to complete the measurement of the direction of the incident signal. The method obtains the incident signal through two sets of binary antennas The direction and the ambiguity of the azimuth are eliminated, and the optimal estimation of the azimuth of the two groups of antennas is ensured by comparing the judgment and error compensation. By combining the unmanned platform inertial navigation equipment, the incident signal azimuth estimation error caused by the platform's own motion is compensated. The invention can provide direction finding information support for realizing precise relative positioning between platforms.

Description

technical field [0001] The invention belongs to the technical field of platform relative positioning, and in particular relates to a method for estimating the orientation of an array signal. Background technique [0002] In air formation control, as a backup system based on satellite positioning and navigation and the main means in the case of satellite-guided rejection, there is an urgent need for precise relative positioning capabilities based on non-satellite guidance. This capability cannot be achieved solely by the platform's own inertial navigation system, which will accumulate position errors over time without satellite navigation corrections. If the combination of communication waveform ranging and direction finding with a simple quadruple array antenna installed on the UAV is used, the communication system can provide accurate relative positioning capabilities without the participation of satellite guides. [0003] According to this idea, predecessors have done a l...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S3/46H04B7/08
CPCH04B7/08G01S3/46
Inventor 张锴郭褚冰王志刚张永平
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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