Satellite navigation text processing method and GPS receiver

A GPS receiver and message processing technology, applied in the field of navigation and communication, can solve the problems of long frame synchronization time, delay of the first positioning time of the GPS receiver, and speed up the speed of satellite ephemeris analysis, and achieve the effect of speeding up the speed.

Active Publication Date: 2016-04-27
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a satellite navigation message processing method and a GPS receiver, which solves the problem that in the prior art, the frame synchronization time is relatively long in the process of obtaining satellite navigation message by the receiver, so that the time for

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example

[0049] See figure 1 , The first embodiment of a satellite message processing method in the embodiment of the present invention includes:

[0050] S1: Perform complete frame synchronization processing on the first satellite captured and tracked;

[0051] In this embodiment, when it is necessary to perform navigation on the boot to determine the coordinate position, the first satellite to be captured and tracked needs to be processed for complete frame synchronization. It should be noted that the foregoing complete frame synchronization processing may be The first tracked satellite completes normal frame synchronization in the received navigation bits by searching for an 8-bit synchronization code and word verification. The first satellite captured and tracked refers to the satellite tracked by the receiver when it enters the working state after power-on.

[0052] S2: Perform verification frame synchronization processing on the satellites acquired and tracked subsequently;

[0053] After

Example

[0058] The above is a detailed description of the process of the navigation message processing method. The following is a detailed description of the process of the subsequent acquisition and tracking of the satellites to verify the frame synchronization process, please refer to figure 2 , The second embodiment of a method for processing satellite navigation messages in the embodiment of the present invention includes:

[0059] 201. Determine the startup mode of the receiver, if it is a cold start, go to step 202, if it is a warm start, go to step 203;

[0060] In this embodiment, when it is necessary to navigate the boot to determine the coordinate position, it is first necessary to determine the startup mode of the receiver. If it is a cold start, perform step 202, and if it is a warm start, perform step 203.

[0061] 202. Perform satellite acquisition and tracking sequentially according to the PRN number;

[0062] When it is judged that the start mode of the receiver is cold start, th

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Abstract

The invention discloses a satellite navigation text processing method and a GPS receiver and solves a problem of time delay of the first positioning time of the GPS receiver caused by the relatively long time for receiving a relatively complete satellite ephemeris because of the relatively long frame synchronization time consumed by a receiver for acquiring a satellite navigation text. Through the method, the satellite navigation text frame synchronization speed is improved effectively, so the satellite ephemeris analysis speed is accelerated. The method comprises steps that S1, complete frame synchronization processing on a first captured and tracked satellite is carried out; S2, word check frame alignment synchronization processing is employed for satellites which are subsequently captured and tracked; and S3, a frame word acquired after complete frame synchronization processing and word check frame alignment synchronization processing is analyzed, and the coordinate information is acquired.

Description

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Claims

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Application Information

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Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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