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Method for acquiring accurate intermediate frequency for global positioning system

A global positioning system, intermediate frequency technology, applied in the direction of positioning, radio wave measurement system, beacon system using radio waves, etc., can solve the problem of GPS receiver consumption, long time, etc., to achieve the effect of shortening the satellite search time

Inactive Publication Date: 2010-07-07
ALTEK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the GPS receiver must spend a considerable amount of time on the initial satellite search

Method used

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  • Method for acquiring accurate intermediate frequency for global positioning system
  • Method for acquiring accurate intermediate frequency for global positioning system
  • Method for acquiring accurate intermediate frequency for global positioning system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0070] The technical solutions of the present invention will be further described in more detail in conjunction with the accompanying drawings and specific embodiments.

[0071] figure 1 It shows a Global Positioning System (Global Positioning System; GPS) receiver applying an embodiment of the present invention.

[0072] refer to figure 1 , the GPS receiver 100 generally includes: an antenna 110 , a radio frequency (radio frequency, RF) module 130 , a signal processor 150 and an input / output (input / output, I / O) module 170 .

[0073] The antenna 110 is electrically connected to the radio frequency module 130 . The radio frequency module 130 has an oscillator. The radio frequency module 130 can use an oscillator to provide a specific frequency, and use the specific frequency to wirelessly connect the satellites 212 , 214 , 216 , 218 in the orbiting satellite group through the antenna 110 . Moreover, after the radio frequency module 130 forms a wireless connection with the s...

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Abstract

The invention discloses a method for acquiring accurate intermediate frequency for a global positioning system (GPS), which is used in a GPS receiver. The method comprises the following steps of: firstly, searching a satellite by utilizing standard frequency of a radio frequency module of the GPS receiver, and receiving satellite signals of a satellite through signal frequency; secondly, acquiring complete ephemeris data by utilizing the received satellite signals, and calculating a coordinate of the GPS receiver; thirdly, calculating a first coordinate of the satellite at a first time point and a second coordinate of the satellite at a second time point by utilizing the acquired ephemeris data; fourthly, calculating the moving speed of the satellite and the projection amount of the moving speed on vectors from the first coordinate to the coordinate position by utilizing the first time point, the first coordinate, the second time point and the second coordinate; and finally, calculating the accurate intermediate frequency by utilizing the signal frequency, carrier frequency of the satellite, the calculated projection amount and light speed.

Description

technical field [0001] The present invention relates to a global positioning system (Global Positioning System; GPS), in particular to a method for obtaining an accurate intermediate frequency of the global positioning system. Background technique [0002] The global satellite navigation system is also called the Global Positioning System (Global Positioning System; GPS). The global positioning system has been limited to military and industrial purposes in the past. With the continuous advancement of science and technology, it has begun to be used in various civilian uses. Generally speaking, GPS products mainly refer to GPS receivers used for various purposes, such as receivers for aviation and marine purposes, car navigation equipment, handheld receivers for mountaineering and leisure, and other types of communication products. The components of general GPS products mainly include internal antennas, chipsets, and external buttons, display panels and other related componen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/04G01S5/02
Inventor 陈宏升
Owner ALTEK CORP
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