A Vector Tracking Channel Fault Detection Method Based on Support Vector Machine

Abstract

The invention discloses a vector tracking channel fault detection method based on a support vector machine. The method comprises the steps as follows: 1, carrier and code NCO parameters are computed by using the position, speed, clock correction, clock drift and satellite ephemeris of a receiver; 2, outputs of a frequency detector and a code ring discriminator are used as measured information of a navigation filter used for estimating the position, speed, clock correction, clock drift and satellite ephemeris of the receiver, correcting the position and speed of the receiver by using the estimated information, and then computing carriers and code NCO by using the corrected position and speed of the receiver in combination with the satellite ephemeris to keep tracking on an input signal; and 3, an information sequence corresponding to each channel is used as the input of a support vector machine for judging whether the channel is normal. According to the method provided by the invention the channel with a fault can be accurately detected, meanwhile a calculation amount is significantly improved, instantaneity of a loop is not affected, and application prospects are wide.

Description

technical field [0001] The invention relates to the field of satellite navigation and satellite navigation software receivers, in particular to a vector tracking channel fault detection method based on a support vector machine. Background technique [0002] GPS is a space-based navigation system developed by the US Department of Defense, which has the characteristics of safety, all-weather and high precision. Users all over the world can obtain their own position, speed and time information in real time by using the receiver to receive signals from no less than 4 navigation satellites. At present, GPS is widely used in weapon guidance, vehicle navigation, geodetic survey, earthquake prediction, and weather forecast. [0003] The new generation of receiver technology based on vector tracking algorithm can track weak signals. The navigation filter of vector tracking algorithm adopts Kalman filter algorithm, which realizes the joint tracking of satellite signals of all channel...

AI Technical Summary

Problems solved by technology

[0003] The new generation of receiver technology based on vector tracking algorithm can track weak signals. The navigation filter of vector tracking algorithm adopts Kalman filter algorithm, which realizes the joint tracking of satellite signals of all channels, and has better robustness and instantaneous Ability to bridge signals, but failure or poor signal quality of any channel can affect other channels

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