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Fast Cold Start Method of Satellite Receiver

A satellite receiver and cold-start technology, applied in the field of satellite receivers, can solve the problems of slow cold-start process, affect receiver timeliness, affect positioning efficiency, etc., achieve fast positioning, shorten cold-start time consumption, and improve positioning accuracy Effect

Active Publication Date: 2019-03-29
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used cold start adopts a method similar to polling to lock signals from all satellites. Due to the lack of previous information, the cold start process is very slow, and the complex outdoor operating environment affects the positioning efficiency and cannot provide real-time and efficient Navigation data and position information greatly affect the timeliness of the receiver

Method used

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  • Fast Cold Start Method of Satellite Receiver
  • Fast Cold Start Method of Satellite Receiver
  • Fast Cold Start Method of Satellite Receiver

Examples

Experimental program
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Effect test

Embodiment 1

[0035] This embodiment is a cold start of the GPS satellite receiver, and the satellite data used is obtained by collecting and counting all-weather GPS satellite data in many places in China and Russia. Such as figure 1 As shown, the fast cold start of the GPS satellite receiver includes the following steps:

[0036] Step 1, grouping the satellites in the satellite system according to their orbits;

[0037] There are 32 GPS satellites in total, distributed in six orbits, so the 32 satellites are divided into six groups A, B, C, D, E, and F according to their orbits; the kth group, that is, the number of satellites in the kth orbit is N k , k∈{A,B,C,D,E,F};

[0038] Step 2, sort the satellite groupings according to the statistical results visible to satellites in each orbit to obtain the orbit priority;

[0039] According to the satellite data adopted in this embodiment, it can be calculated by formula (2), the mathematical expectation E(X) of a single orbit k | k The ord...

Embodiment 2

[0067] This embodiment takes the Beidou navigation satellite receiver independently developed by China as an example.

[0068] As of June 2016, the Beidou system had 21 satellites in orbit, 14 of which were launched before the end of 2012, and the remaining 7 were launched after February 2015. Therefore, most of the current Beidou receivers are designed in Based on 14 satellites launched in 2012, satellites launched after that are not within the capture range. The Beidou receiver used in this embodiment is also based on the constellation structure of 14 satellites in 2012.

[0069] Step 1, grouping the satellites in the satellite system according to their orbits;

[0070] Among the in-orbit working satellites launched before the end of 2012, there are 5 GEO satellites, whose PRN codes are 01-05; 5 IGSO satellites, whose PRN codes are 06-10; 4 MEO satellites, whose PRN codes are 11-14. The satellites are thus divided into 3 groups: GEO, IGSO and MEO.

[0071] Step 2. Sorting...

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Abstract

The invention discloses a rapid cold starting method for a satellite receiver. The method comprises the following steps that 1, satellites in a satellite system are grouped according to tracks where the satellites are located; 2, the satellite groups are sorted according to the visual statistical result of the satellites inside each track to obtain the track priority; 3, the satellites inside each satellite group are sorted according to the visual probability to obtain the satellite priority; 4, in each satellite group, the relevancy of any two satellites is calculated; 5, according to the track priority, the satellites of each track are caught; the satellites inside each track are caught according to the satellite priority, and when one satellite is caught, the caught satellite is subjected to relevancy optimization and catching of the satellites of the track is ended; 6, after all the tracks are caught, all the caught satellites are output, cold starting is ended. According to the method, the high-frequency visible satellites are subjected to priority catching, and the speed of determining position information of the receiver is increased.

Description

technical field [0001] The invention belongs to the technical field of satellite receivers, and in particular relates to a cold start method of a satellite receiver. Background technique [0002] Satellite navigation and positioning systems are widely used in military and civilian applications. At present, many countries are vigorously developing and building their own navigation systems, such as GPS in the United States, GLONASS in Russia, Galileo in Europe, and Beidou system in China. Among them, the GPS system is currently the most widely used navigation system in practice. After years of development, GPS currently has 32 satellites in orbit. It is in the stage of comprehensive modernization but has not yet been completed. The target configuration is 36 / 6 / 1. The six orbits are A, B, C, D, E, F, where the PRN codes of satellites included in orbit A are 07, 24, 30, 31, and the PRN codes of satellites included in orbit B are 04, 12, 16, 26, 25, 28, satellite PRN codes in o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/28
CPCG01S19/28
Inventor 陈熙源吴俊强张梦尧方琳汤新华
Owner SOUTHEAST UNIV
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