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Method and system for tracking global positioning receiver

A global positioning and tracking system technology, applied in satellite radio beacon positioning system, positioning, radio wave measurement system, etc., can solve the problems of low tracking accuracy and robustness, complex loop structure, and a large number of hardware resources , to achieve the effects of improved tracking sensitivity, improved tracking robustness, and low cost

Active Publication Date: 2009-05-27
北京中科微知识产权服务有限公司
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AI Technical Summary

Problems solved by technology

However, this kind of loop structure is complex, the operation requires a lot of hardware resources, and the power consumption is also considerable.
And the tracking accuracy and robustness are not high

Method used

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  • Method and system for tracking global positioning receiver
  • Method and system for tracking global positioning receiver
  • Method and system for tracking global positioning receiver

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Embodiment Construction

[0055] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the wireless positioning method proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. Details are as follows.

[0056] Figure 5 A schematic structural diagram of the combined tracking of multiple tracking channels proposed by the present invention is described. Different from the tracking loop shown in FIG. 4 , the structure of the tracking channel proposed by the present invention uses multiple identical tracking sub-channels 501 - 503 to track the same signal (same satellite) 504 . Not only does each tracking sub-channel have a separate frequency estimation unit 509, but also all tracking sub-channels 501-503 in the entire tracking channel share an overall frequency estimation unit 511...

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Abstract

The invention discloses a global positioning receiver tracking system and a method thereof, wherein the method comprises: estimating the Doppler shift of a target satellite, updating step length by shifting a plurality of frequencies centered on the estimated Doppler shift to acquire a plurality of local carrier wave Doppler, updating a plurality of identical tracking sub-channels, enabling each of the tracking sub-channels to track independently, detecting the signal intensity of each channel and taking the tracking Doppler of the tracking channel with the highest signal intensity as the Doppler shift of the target satellite to estimate, updating each of the tracking sun-channels again based on the result and realizing continual tracking. On the premise of acquiring a more accurate frequency initial estimation, the multi-channel combined tracking method can greatly improve the tracking sensitivity and tracking robustness without the assistance of other information and can acquire better performance by combining with the proven designed various carrier wave tracking loops. Moreover, the system has the advantages of simple structure and easy realization and transplantation.

Description

technical field [0001] The invention relates to the field of global satellite positioning and navigation, in particular to a tracking technology for a global positioning system receiver. Background technique [0002] Global satellite positioning and navigation systems, such as the Global Positioning System (GPS), include a constellation of satellites (also known as Navstar satellites) that transmit GPS signals that can be used by a receiver to determine the receiver's location. Satellite orbits are arranged in multiple planes so that the signal can be received from at least four satellites at any location on Earth. More typically, the signal is received from more than six satellites in most places on Earth. [0003] The GPS signal sent by each GPS satellite is a direct sequence spread spectrum signal. The commercially used signal is associated with the Standard Positioning Service (SPS) and is a direct-sequence biphase spread-spectrum signal known as a coarse code (C / A cod...

Claims

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Application Information

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IPC IPC(8): G01S1/02G01S5/02G01S19/24
Inventor 郑睿陈培王云陈杰
Owner 北京中科微知识产权服务有限公司
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