Beidou satellite signal capturing method and device

A Beidou satellite and signal capture technology, which is applied in the field of navigation signal detection, can solve problems such as poor real-time performance, long capture time, and complex implementation, and achieve the effects of less hardware resource requirements, short capture time, and improved efficiency

Pending Publication Date: 2020-06-09
交通运输部长江通信管理局 +2
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Problems solved by technology

Serial capture means that in the process of capturing the pseudo code, the phase of one spread spectrum symbol is slid each time to carry out the correlation operation until the set correlation value is obtained, then the capture is successful and the code tracking is performed. The hardware implementation of this method is simple. It has been widely used in spread spectrum communication systems, but the capture time is long and the real-time performance is poor; in parallel capture, a correlator is set for each phase, and correlation

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  • Beidou satellite signal capturing method and device
  • Beidou satellite signal capturing method and device
  • Beidou satellite signal capturing method and device

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[0037] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

[0038] see figure 1 ,in, figure 1 It is a flowchart of an embodiment of the Beidou satellite signal acquisition method of the present invention. combine figure 1 The Beidou satellite signal acquisition method of the present invention will be described in detail.

[0039] S1: Divide each piece of Beidou intermediate frequency signal data into at least two first blocks with the same number of sampling points, and generate a pseudocode whose length is half of the intermediate frequency signal data, and divide the pseudocode into at least two blocks with the same number of sampling points as the first block. A second block with the same length and the ...

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Abstract

The invention provides a Beidou satellite signal capturing method and device. The method comprises steps of segmenting Beidou intermediate frequency signal data into a first block, generating a pseudocode, and segmenting the pseudo code into a second block; respectively carrying out fast Fourier transform of the first block and the second block, multiplying the result of the first block by a conjugate of the result of the second block, and carrying out reverse fast Fourier transform of a product result; filling the product result into a matrix, carrying out zero padding expansion to form a first matrix, carrying out Fourier transform of each column of the first matrix, taking an absolute value, and superposing the first matrixes; and capturing a Beidou satellite signal according to the element with the maximum numerical value of the first matrix. The method is advantaged in that the satellite signal capturing time is short, hardware resource requirements are few, precision is high, advantages of a Beidou system constellation can be used for preferentially capturing Beidou satellite signals, capturing of other constellations is assisted, and satellite signal capturing efficiency isimproved.

Description

technical field [0001] The invention relates to the field of navigation signal detection, in particular to a Beidou satellite signal acquisition method and device. Background technique [0002] The BeiDou (COMPASS) Navigation Satellite System is a global satellite navigation system independently developed and operated by China. It is also known as the world's four major satellite navigation systems together with the US GPS, Russia's GLONASS, and the EU's Galileo system. Compared with other satellite navigation systems, the space segment of the Beidou satellite navigation and positioning system is a mixed constellation consisting of satellites in three different orbits. The Beidou satellite navigation system has more high-orbit satellites and has stronger anti-shading capabilities. The priority acquisition of the Beidou system is conducive to the rapid solution of the base station system. [0003] The main methods of satellite signal capture are serial capture, parallel cap...

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Application Information

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IPC IPC(8): G01S19/30
CPCG01S19/30
Inventor 熊辉孙鹏文述生陆民军潘伟锋沈建军李宁廖威王江林文军福闫少霞刘国光姚林陈柯萌罗君凌家龙
Owner 交通运输部长江通信管理局
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