Carrier wave tracking system and method of GPS coarse / capturing code signal

A carrier tracking and code signal technology, which can be used in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., and can solve problems such as carrier phase difficulties.
CN101435866AInactive Publication Date: 2009-05-20许军
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
许军
Publication Date
2009-05-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a carrier tracking system of a GPS coarse / acquisition code signal and a method thereof. The system comprises an input signal, a loop circuit, a frequency discriminator in the loop circuit, a phase discriminator, a loop circuit filter and a numerical controlled oscillator (NCO), wherein the loop circuit is used for processing the input signal, and is combined by a frequency locked loop and a phase locked loop; the loop filter filters the output of the phase discriminator and phase discriminator; the numerical controlled oscillator (NCO) is connected with the output of the loop circuit filter. The system combines the frequency locked loop and the phase locked loop, when a frequency error is larger, the frequency locked loop plays the major role to be favorable for improving the bandwidth of a tracked loop, so that phase locking can be more easily; when the frequency error is smaller, the phase locked loop dominates to make the loop bandwidth smaller, so as to reduce noise influence and improve tracking precision.
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Description

technical field

[0001] The present invention relates to a processing system and method for receiving signals in a Global Positioning System (Global Positioning System, GPS), in particular to a carrier tracking processing system and method for a GPS coarse / acquisition code (Coarse / Acquisition, C / A) signal . Background technique

[0002] The GPS global positioning system, as a new generation of satellite navigation and positioning system, was originally developed by the US military and used by the three armed forces. After years of development, the current GPS system has become a widely used military-civilian dual-use system. Its application fields and application prospects far exceed the original imagination of the system designer. In almost all fields such as resource exploration, communication, and meteorology, it is used as a very important technical means and method for navigation, timing, positioning, measurement of geophysical parameters, and measurement of atmospheric...

Claims

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