A Method of Measuring Acceleration Using Carrier Tracking Loop of Satellite Receiver

Abstract

An acceleration-measuring method by a satellite receiver carrier tracking loop comprises a step (1) that a radio-frequency signal received by an antenna is converted into a data medium-frequency signal through a radio-frequency front end processing chip, a step (2) that signal capture is achieved by adoption of a frequency domain parallel acquisition method, a step (3) that carrier tracking is achieved through adoption of a third-order phase locked loop and pseudorandom code tracking is achieved through a delay locked loop, a step (4) that after carrier peeling and pseudorandom code peeling of the data medium-frequency signal are achieved through baseband signal processing, navigation data are obtained, the navigation data are decoded to get a satellite ephemeris, and acceleration of the satellite is calculated by the usage of information difference of satellite speed, a step (5) that an acceleration state parameter in a carrier loop wave filter is sent out, and line-of-sight acceleration relative to the tracked satellite of a user is obtained after sacel transformation of a fixed scale transformation ka, and a step (6) that the acceleration of the receiver is calculated. The acceleration-measuring method by the satellite receiver carrier tracking loop has the advantages of being simple in principle, high in measuring precision, wide in application range and the like.

Description

technical field [0001] The invention mainly relates to the application fields of satellite measurement and satellite navigation, in particular to a method for measuring acceleration by using a carrier tracking loop of a satellite receiver. Background technique [0002] "Acceleration" characterizes the amount of change in velocity per unit time, and is one of the main parameters describing the motion of an object. Accurate determination of acceleration is of great significance in many fields such as dynamic measurement, geophysics and navigation control. [0003] The existing methods of measuring acceleration can be divided into indirect method and direct method. The indirect method is based on the constraint relationship between the acceleration parameter and the position and velocity, and is realized by measuring the velocity and then performing a first-order differential or measuring the position and then performing a second-order differential. The direct method is gener...

AI Technical Summary

Problems solved by technology

It can be seen that the existing methods of measuring acceleration using satellite receivers are all indirect methods, and all require differential calculations, and the differential process itself will introduce noise, so the measurement accuracy is lost

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