Method for generating universal three-dimensional carrier motion trail in GNSS simulator
A motion trajectory and simulator technology, applied in the field of satellite navigation, can solve the problems of navigation satellite system signal frequency and structure, limited carrier dynamics, fixed functions, etc.
Active Publication Date: 2013-04-24
BEIHANG UNIV
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[0004] Various models of GNSS satellite signal simulators have been developed abroad, such as the GPS simulator of CAST Company of the United States, the GSS series simulator of Spirent Company of the United Kingdom, and the GNSS simulator of IFEN Company of Germany, but most of them have fixed functions and can simulate Navigation satellite system, signal frequency and structure, carrier dynamics, etc. are strictly limited
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[0135] Utilize the general three-dimensional carrier trajectory generation method provided by the present invention to simulate and generate such as image 3 The carrier movement trajectory shown is taken as an example, and the specific implementation steps are described by taking the WGS-84 earth coordinate system as an example.
[0136] Step 1: The GNSS simulator user sets the carrier trajectory parameters, and generates the carrier trajectory user configuration file.
[0137] For example, set the initial position of the carrier: longitude 116°, latitude 39°, elevation 100m; set the initial velocity of the carrier in the geographic coordinate system: eastward 100m / s, northward 0m / s, skyward 0m / s; set the carrier trajectory segment and Parameters, the trajectory is composed of 10 linear motion segments and circular motion segments, the first 5 segments are taken as an example, they are:
[0138] (a) The first segment is straight-line motion, the eastward, northward, and skyw...
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The invention relates to a method for generating universal three-dimensional carrier motion trail in GNSS simulator, including six steps: firstly, a carrier motion trail user configuration file is pre-generated, and carrier motion segments and trail parameters are set; secondly, when carrier motion trail simulation is started, the preset initial position is taken as origin and a geographic coordinate system is created; thirdly, real time trail simulation calculation is carried out on carrier motion segment in spatial linear motion type; fourthly, real time trail simulation calculation is carried out on carrier motion segment in spatial circle motion type; fifthly, for continuity of motion segments, the last state of a previous motion segment is taken as the initial state of the current motion segment; sixthly, carrier real time position is converted into a geodetic coordinate system to be displayed and output in real time, and the carrier real time position and speed are converted into an ECEF coordinate system, thus supporting further function realization of simulator. The invention can build a universal three-dimensional carrier motion trail generating model and has better practical value and wide application prospect in the technical field of satellite navigation.
Description
(1) Technical field [0001] The invention relates to a method for simulating motion trajectory of a receiver carrier in a global satellite navigation system (GNSS) satellite signal simulator, in particular to a method for generating a motion trajectory of a general three-dimensional carrier in a GNSS simulator, belonging to the technical field of satellite navigation. (2) Background technology [0002] The GNSS satellite signal simulator calculates the position of the receiver in real time by generating the motion trajectory of the satellite signal receiver carrier, and judges the satellite visibility based on the real-time position of the satellite, and calculates the satellite signal power, pseudorange, Doppler, carrier phase, etc. The receiver observes the data in real time, so as to realize the spread spectrum code modulation and carrier modulation of the navigation data, and simulate the satellite navigation signal received by the receiver in the actual application scene,...
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IPC IPC(8): G01S19/23
Inventor 赵昀寇艳红黄智刚张其善
Owner BEIHANG UNIV