Highly precise test method of GNSS receiver dynamic performance index based on simulator

A dynamic performance and testing method technology, applied in the direction of instruments, measuring devices, radio wave measuring systems, etc., can solve the problems of large test errors and inability to locate, and achieve the effects of strong controllability, accurate test accuracy, and stable test results

Inactive Publication Date: 2020-02-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

The technical problem to be solved by the present invention discloses a high-precision testing method for GNSS receiver dynamic performance indicators based on a simulator is: by directly adding the same pseudo-range and pseudo-range rate changes to each satellite during the test process of a

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  • Highly precise test method of GNSS receiver dynamic performance index based on simulator
  • Highly precise test method of GNSS receiver dynamic performance index based on simulator
  • Highly precise test method of GNSS receiver dynamic performance index based on simulator

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Embodiment 1

[0048] In order to verify the feasibility of the method, the ballistic missile is used as the carrier for the test, and the speed of the ballistic missile is set to 250m / s, 1000m / s and 5000m / s respectively, and the acceleration of another group of missiles is set to 10m / s 2 experiments to verify the feasibility of this method. By directly adding 250m / s, 1000m / s, 5000m / s first-order stacking amount and 10m / s to the pseudorange of each satellite in the simulator 2 The second-order superposition of . The pseudorange accuracy of each satellite can be calculated using the test evaluation computer. The test accuracy graph and test results are shown in the figure:

[0049] Such as figure 1 As shown, the high-precision test method of the GNSS receiver dynamic performance index based on the simulator disclosed by the present invention, the specific implementation steps are as follows:

[0050] Step 1: In a static test scenario, establish a pseudorange bias observation equation for ...

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Abstract

The present invention discloses a highly precise test method of a GNSS receiver dynamic performance index based on a simulator, and belongs to the field of receiver dynamic performance test methods. An implementation method of the present invention is as follows: in a static test scenario, establishing a pseudo-range deviation observation equation used for observing a pseudo-range deviation; superposing a same amount to pseudo-ranges of all satellites, and expanding a pseudo-range observation equation into a matrix form, which is defined as a pseudo-range deviation observation expanded equation; obtaining a pseudo-range rate deviation observation expanded equation when a same second-order change value is superposed to the pseudo-ranges of all satellites; and performing transformation to obtain a pseudo-range deviation observation combined equation and a pseudo-range rate deviation observation equation. A same pseudo-range and pseudo-range rate change rate is directly added to each satellite in a test process, so that a pseudo-range of each satellite is changed by a same magnitude, a problem of failing to perform positioning in a receiver high speed scenario is avoided, and influence of large test errors due to different satellite pseudo-range changes is eliminated.

Description

technical field [0001] The invention relates to a simulator-based high-precision test method for the dynamic performance index of a GNSS receiver, belonging to the field of receiver dynamic performance test methods. Background technique [0002] The basic principle of the satellite navigation system is that the user receives the navigation signals of no less than 4 satellites at the same time, so as to measure more than 3 pseudo-range observations, and the relative equipment delay deviation between satellite coordinates, satellite clock errors and different satellite frequencies Knowing the situation, calculate your own three-dimensional coordinates and clock error. Pseudorange accuracy refers to the deviation between the pseudorange measured by the receiver and the true pseudorange. Therefore, the pseudo-range is the most basic observation of the satellite navigation system, and the observation accuracy of the pseudo-range directly determines the navigation and positioning...

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Application Information

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IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 李怀建徐荣景杜小菁武新波
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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