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Combination positioning method of pseudolite, GPS and Beidou navigation system

A Beidou navigation system and GPS navigation technology, applied in satellite radio beacon positioning system, radio wave measurement system, measurement device, etc., can solve the problem of insufficient number of visible navigation satellites, low vertical positioning accuracy, and poor geometric distribution of constellations and other problems, to achieve the effect of improving geometric distribution, high positioning accuracy, and reducing VDOP value

Active Publication Date: 2017-02-15
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0003] The purpose of the present invention is to design a signal differential pseudolite system for the defects of insufficient number of visible navigation satellites, poor geometric distribution of constellations, and low vertical positioning accuracy caused by satellite navigation systems in special geographical environments or application environments. And a positioning method combining pseudolite, GPS and Beidou navigation system is proposed, which effectively improves the geometric distribution of the satellite navigation system, increases the number of navigation stars, and improves the positioning accuracy

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  • Combination positioning method of pseudolite, GPS and Beidou navigation system
  • Combination positioning method of pseudolite, GPS and Beidou navigation system
  • Combination positioning method of pseudolite, GPS and Beidou navigation system

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Embodiment Construction

[0038] Below in conjunction with specific embodiment and accompanying drawing, the present invention will be further described:

[0039] 1. Build a direct signal differential pseudolite system; the direct signal differential pseudolite system includes a direct signal differential pseudolite, user receivers, Beidou navigation satellites and GPS navigation satellites; the direct signal differential pseudolite includes Pseudo-satellite synchronous receiver and pseudo-satellite signal transmitter;

[0040] ②The pseudolite synchronous receiver simultaneously receives the pseudolite navigation signal transmitted by the pseudolite signal transmitter, the Beidou navigation signal transmitted by the Beidou navigation satellite and the GPS navigation signal transmitted by the GPS navigation satellite; The pseudo-range value of the aircraft and the pseudolite transmitting antenna, the pseudo-range value of the pseudolite synchronous receiver and the Beidou navigation satellite, the pseud...

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Abstract

The invention discloses a positioning method for the combination of pseudolite, GPS and Beidou navigation system. The synchronous receiver simultaneously receives the pseudolite signal, GPS satellite navigation and Beidou satellite navigation signal, and calculates the correction value of the satellite clock difference and the navigation message according to the ranging value of the pseudolite and the ranging value of the navigation satellite. The message is sent to the pseudolite signal transmitter in real time, and the transmitter broadcasts the message to the user receiver. 3. The user receiver corrects the satellite clock differential correction value into the GPS satellite navigation and Beidou satellite navigation measurement equations, and the difference eliminates the navigation satellite clock bias, ephemeris error, ionospheric error and tropospheric error. Finally, it is combined with the pseudolite measurement equation to form a measurement equation group that is not affected by the satellite clock error, and the least square method is used to perform combined differential positioning of pseudolite, Beidou and GPS.

Description

technical field [0001] The invention relates to the technical field of satellite navigation ground-based local area enhancement, in particular to a positioning method combining pseudolite, GPS and Beidou navigation system. Background technique [0002] At present, with the official operation of the Beidou satellite navigation system, more and more user receivers have the combined positioning capability of GPS and Beidou multi-navigation systems, but this type of combined positioning needs to know or calculate the time between multiple satellite navigation systems deviation. The traditional solution is to add the unknown parameters of GPS and Beidou system time deviation into the positioning equation, and solve it directly by solving the equations. The disadvantage of this method is that the user machine needs to receive at least 5 visible satellites at the same time. The signal differential pseudolite will effectively solve the above defects and realize the high-precision c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/33G01S19/27G01S19/46G01S19/41
CPCG01S19/46
Inventor 甘兴利蔚保国王珏李隽董立桥赵娓刘市张志新
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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