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

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...

AI Technical Summary

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 static scene It not only avoids the problem of inability to locate due to the high-speed receiver in the test scene, but also eliminates the influence of the large test error due to the different pseudo-range changes of the satellites in the test scene when the receiver moves at a high speed.

Images