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

A global positioning system and receiver technology, used in positioning, radio wave measurement systems, beacon systems using radio waves, etc., can solve the problems of difficult hardware implementation, complex loop structure, etc. Simple structure, simple structure effect

Active Publication Date: 2011-10-26
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
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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 illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following describes the specific implementation, structure, features and effects of the wireless positioning method proposed by the present invention with reference to the accompanying drawings and preferred embodiments, Details are as follows.

[0059] Image 6 Describe the structure of the self-assisted tracking proposed by the present invention. and image 3 , Figure 4 as well as Figure 5 The structure shown is similar, 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 and image 3 , Figure 4 as well as Figure 5 The code loops shown are identical. but different from image 3 , Figure 4 as well as Figure 5 In the configuration shown, a separate Doppler predictor 61...

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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 shiftto 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] A global satellite positioning and navigation system, such as the Global Positioning System (GPS), includes 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. The satellite orbits are arranged in multiple planes so that such signals can be received from at least four satellites anywhere on Earth. More typically, such signals are 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. Commercially used signal is related to Standard Positioning Service (SPS) and is called Coarse Code (C / A Code) Direct Sequence Bi-Phase Spread Spectrum s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S1/02G01S5/02
Inventor 郑睿陈杰
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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