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Automatic auxiliary tracking system and tracking method of global position system receiver

A global positioning system and tracking system technology, applied in positioning, radio wave measurement system, beacon system using radio waves, etc., can solve the problems of complex loop structure and difficult hardware implementation, and achieve simple loop structure and system Low cost and easy to achieve effect

Active Publication Date: 2009-05-27
中科芯(荣成)信息技术产业研究院有限公司
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Problems solved by technology

But this kind of loop structure is complicated, EKF contains a large number of matrix operations, it is difficult to realize by hardware, and the power consumption is also considerable

Method used

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  • Automatic auxiliary tracking system and tracking method of global position system receiver
  • Automatic auxiliary tracking system and tracking method of global position system receiver
  • Automatic auxiliary tracking system and tracking method of global position system receiver

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Embodiment Construction

[0058] 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.

[0059] Fig. 6 depicts the structure of the self-assisted tracking proposed by the present invention. Similar to the structures shown in FIG. 3 , FIG. 4 and FIG. 5 , the correlator group 606 , the code phase detector 607 , the code filter 608 , the code NCO 610 and the code generator 611 together form a code loop. The structure and function of this part are exactly the same as the code rings shown in Fig. 3, Fig. 4 and Fig. 5. But different from the structures shown in FIG. 3 , FIG. 4 and FIG. 5 , an independent Doppler predictor 613 and a carrier numerically controlled oscillato...

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Abstract

The invention discloses a self-assistant tracking system and a tracking method for a global positioning receiver, wherein the method comprises the following steps: predicating the Doppler shift of a target satellite; revising the predicated Doppler and the change rate of the predicated Doppler shift based on the information of the tracking satellite; and using the revised predicated Doppler shift to control carrier wave NCO to replace a carrier wave tracking loop and combine code loop to realize the tracking of the target satellite. On the premise of acquiring satellite navigation text in advance, the self-assistant tracking method only needs a satellite in tracking state to revise the Doppler without the assistance of other information and greatly improve tracking sensitivity on the basis of not increasing integral calculation amount. Real data test proves that, the tracking sensitivity of the method can excess -160dBm when tracking the signal with low movement. In addition, the method has the advantages of simple structure, limited required hardware resource and easy realization and transplantation.

Description

technical field [0001] The invention relates to the field of global satellite positioning and navigation, in particular to the technical field of tracking 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 transmitted 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 coa...

Claims

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Application Information

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IPC IPC(8): G01S1/02G01S5/02
Inventor 郑睿陈杰
Owner 中科芯(荣成)信息技术产业研究院有限公司
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