Satellite information operational method for global positioning system device

Abstract

The invention discloses a satellite information operational method for a global positioning system device. The method comprises the following steps of: providing a antenna module for receiving satellite signals; providing a signal processing circuit for performing analog-to-digital signal processing on the satellite signals and acquiring a plurality of packets of first digital data; providing a memory which stores a check list, wherein the check list records corresponding relations between a plurality of packets of second digital data and a plurality of packets of return values; and providing a central processing unit for grouping each of the first digital data in turn by utilizing number of any packet of the second digital data in the check list so as to obtain each of the second digital data corresponding to each of the grouped first digital data through comparison, and searching out each corresponding return value according to each obtained second digital data through comparison to calculate continuously according to each searched return value.

Description

technical field [0001] The invention relates to a satellite information computing method, in particular to a satellite information computing method of a global positioning system device. Background technique [0002] The Global Positioning System (GPS) device utilizes the basic triangulation principle of satellites. From the location of each satellite, measure the distance between each satellite and the GPS device, and then calculate the three-dimensional space coordinate value of the location of the GPS device. When the GPS device receives a satellite signal, it can be converted into the distance between the position and the satellite through the internal microprocessor. When receiving two satellite signals, the GPS device can calculate a plane coordinate information. When the third satellite signal is received, the location coordinate information can be calculated. A general GPS device utilizes receiving more than 4 satellite signals to determine the location and altitu...

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Problems solved by technology

[0004] Generally speaking, according to the sampling frequency of the wireless signal, the GPS device accumulates all the sampling points in units of 1 millisecond to obtain satellite information. However, the above-mentioned process needs to be completed through a large number of calculation procedures. For example, the received After the satellite signal is processed by analog / digital conversion, it becomes a series of digital data containing "0" and "1". Then, the digital data is mutually exclusive or (XOR) with the carrier frequency and the C / A code, and then the Accumulation operation, used to obtain satellite information, in other words, as the number of digital data increases, the operation time also increases

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