Autonomous integrity fault detection method for receiver

Abstract

The invention discloses an autonomous integrity fault detection method for a receiver. The method comprises the following steps of 1, calculating the weight of each satellite participating in positioning at an epoch t, 2, establishing a positioning equation of the epoch t, and solving a positioning result; 3, calculating a standard error of the positioning result, comparing the standard error witha pre-designed positioning error threshold value, if the standard error is lower than the pre-designed positioning error threshold value, indicating that the current positioning is successful, executing step 4, if the standard error is higher than the pre-designed positioning error threshold value, indicating that the current positioning result is unreliable, and ending fault detection at the current epoch t; 4, determining whether each satellite is abnormal or not, completing fault detection of the current epoch t, and executing a step 5; and 5, adding 1 to the value of t, executing 1-4, andperforming fault detection of the next epoch. The method is advantaged in that fault detection is carried out while positioning is carried out, the operation time is greatly reduced, and the influence of a fault satellite on a positioning result is greatly reduced while precision is ensured.

Description

technical field [0001] The invention relates to the technical field of satellite navigation and positioning, in particular to a receiver autonomous integrity fault detection method based on weighted least one multiplication. Background technique [0002] When using the satellite navigation system to locate the receiver, satellite system failures (such as electronic failures, ephemeris and clock errors broadcast by satellites, abnormal atmospheric delays, multipath and receiver failures, etc.) will cause measurement The error of the value will lead to a large error in the positioning result output by the user's receiver, which may have an adverse effect on the user's own safety. With the rapid development and widespread use of global satellite navigation systems, real-time and rapid integrity monitoring is playing an increasingly important role. [0003] RAIM (Receiver Autonomous Integrity Monitoring, Receiver Autonomous Integrity Monitoring) is the real-time monitoring of s...

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Problems solved by technology

[0005] The problem solved by the technology of the present invention is: to overcome the deficiencies of the prior art, to provide a receiver integrity fault detection method, which solves the shortcomings of the traditional RAIM method, such as low accuracy rate and large amount of calculation, and has a relatively high accuracy rate, At the same time, the amount of calculation is small and the speed is fast

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