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Receiver rapidly starting-up and positioning method in global positioning system

A technology of global positioning system and quick start, which is applied in the field of global satellite positioning and navigation systems, which can solve the problems of power consumption and cost increase, time-consuming search and capture, etc., and achieve the effect of small chip area cost, low cost, and improved start-up speed

Active Publication Date: 2009-05-06
中微智创(北京)软件技术有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, such a search and capture process is still time-consuming
At the same time, excessively large-scale parallel correlators will also lead to many negative problems such as a substantial increase in power consumption and cost.

Method used

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  • Receiver rapidly starting-up and positioning method in global positioning system
  • Receiver rapidly starting-up and positioning method in global positioning system
  • Receiver rapidly starting-up and positioning method in global positioning system

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Embodiment Construction

[0060] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0061] figure 1 A typical start-up process of a GPS receiver without assistance information is described. The GPS baseband chip is the baseband signal processing chip in the GPS receiver, and is the core of the entire GPS receiver. Various methods of the present invention are all implemented in the GPS baseband chip. For convenience, "receiver" in the present invention refers to "GPS baseband chip".

[0062] figure 1 The process shown starts from receiver power-on initialization 101 and ends when user position is solved 106 . The term "GPS startup time" refers to the time this process takes. For the sake of simplicity, in the present invention, various starting times refer to the starting time of the GPS receiver (GP...

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PUM

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Abstract

The invention provides a quick starting and positioning method of a receiver in a global positioning system, which relates to the field of global satellite positioning and navigation, such as a GPS system. The method comprises the steps that: the apriori information of the receiver is ensured, and the first time of the final running of the receiver is ensured and stored; when the receiver is restarted, and a second time from a real time clock is ensured. According to the difference of the first time and the second time, a starting method is selected from a hot starting and quick positioning method on the premise that the position of the receiver and the ephemeris of a GPS satellite are known, a warm starting method on the premise that the receiver position, the receiver time and the ephemeris of the GPS satellite are known, a quick starting method by mixing hot start and warm start, and a cold starting method.

Description

technical field [0001] The invention relates to the field of global satellite positioning and navigation systems, in particular to satellite signals received and tracked in an integrated fast acquisition receiver (receiver baseband processing chip), and the rapid realization of receiver position positioning. Background technique [0002] Global satellite positioning and navigation systems, such as the United States' Global Positioning System (GPS), consist of 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 frequency signal. The commercially used si...

Claims

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Application Information

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IPC IPC(8): G01S5/02G01S5/14
Inventor 郑睿陈杰李健
Owner 中微智创(北京)软件技术有限公司
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