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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 receiving the complete satellite ephemeris is relatively long, The delay problem of the first positioning time of the GPS receiver is caused, and the present invention effectively improves the speed of satellite navigation message frame synchronization, thereby speeding up the speed of satellite ephemeris analysis

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  • Satellite navigation text processing method and GPS receiver
  • Satellite navigation text processing method and GPS receiver
  • Satellite navigation text processing method and GPS receiver

Examples

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no. 1 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 captured and tracked first satellite;

[0051] In this embodiment, when it is necessary to navigate the boot to determine the coordinate position, it is first necessary to perform complete frame synchronization processing on the captured and tracked first satellite. It should be noted that the aforementioned complete frame synchronization processing can be performed on the captured For the first satellite tracked, normal frame synchronization is completed by searching for 8-bit synchronization code and word check in the received navigation bits. The first satellite tracked refers to the satellite tracked by the receiver after it is powered on.

[0052] S2: Perform verification frame synchronization processing on the satellites captured and tracked in the follow-up;

[00...

no. 2 example

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

[0059] 201. Determine the startup mode of the receiver, if it is a cold startup, then execute step 202, if it is a warm startup, then execute 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 boot mode of the receiver. If it is a cold boot, go to step 202, and if it is a warm boot, go to step 203.

[0061] 202. Carry out satellite capture and tracking in sequence according to the PRN number;

[0062] When it is judged that the starting mode of the receiver...

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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

technical field [0001] The embodiment of the present invention relates to the technical field of navigation communication, and in particular to a satellite navigation message processing method and a GPS receiver. Background technique [0002] An important performance index of the GPS (Global Positioning System, Global Positioning System) receiver is the speed at which the current coordinates are output after the receiver is started, that is, the time to first fix (TimeToFirstFix, TTFF), including the capture of satellite signals, tracking, bit synchronization, frame A series of processes of synchronization, data demodulation, navigation message decoding and positioning calculation. According to the different data and information status of the receiver when it is started, the receiver's start-up methods can generally be divided into three types: cold start, warm start and hot start. [0003] Wherein, when in cold start or warm start mode, the receiver does not know the curre...

Claims

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Application Information

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IPC IPC(8): G01S19/27G01S19/36
Inventor 胡斌胡胜发
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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