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GNSS interference source positioning method based on grid energy traversal search

A positioning method and interference source technology, applied in satellite radio beacon positioning systems, measuring devices, radio wave measuring systems, etc., can solve problems such as weak satellite signals and achieve high positioning accuracy

Active Publication Date: 2020-01-10
中国电波传播研究所 +1
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Problems solved by technology

However, GNSS satellite signals are weak and are extremely susceptible to interference from co-frequency radio radiation sources

Method used

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  • GNSS interference source positioning method based on grid energy traversal search
  • GNSS interference source positioning method based on grid energy traversal search
  • GNSS interference source positioning method based on grid energy traversal search

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Embodiment 1

[0033] Embodiment 1, this embodiment discloses a GNSS interference source positioning method based on grid energy traversal search on the basis of the existing commonly used received signal strength indication positioning method (RSSI), including the following steps:

[0034] Step 1, divide the selected area into several grids;

[0035] Step 2, take any observation point as a reference observation point, and radiate energy back to each grid point according to the measured value of the received signal energy of the reference observation point, so as to calculate the reverse radiation energy value of each grid point, specifically including:

[0036] Step 21, select a reference observation point, and analyze the propagation characteristics from the reference observation point to each grid point according to the geographic information system. The propagation characteristics are divided into three categories: urban high-rise buildings, low-rise building distribution areas, and unobs...

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Abstract

The invention discloses a GNSS interference source positioning method based on grid energy traversal search. The GNSS interference source positioning method comprises the following steps : the step 1,dividing a selected area into a plurality of grids; the step 2, taking any one observation point as a reference observation point, and calculating a reverse radiation energy value of each grid point;the step 3, radiating the energy of each grid point to another observation point by adopting a traversal search method, and calculating the radiation energy value received by the observation point; and the step 4, performing least square fitting on the energy actually measured by each observation point and the energy radiated by adopting the traversal search method, and determining the grid pointwith the minimum fitting error as a point where an interference source is located. According to the method disclosed by the invention, a region of interest can be divided into a plurality of grids, the smaller the grids are, the higher the precision is, and moreover, the calculated amount is larger, so that the positioning precision can be greatly improved on the basis of the existing RSSI positioning method.

Description

technical field [0001] The invention belongs to the field of GNSS interference source positioning, in particular to a GNSS interference source positioning method based on grid energy traversal search in the field. Background technique [0002] The global navigation satellite system (GNSS) sends coded and modulated navigation signals from the satellite to the ground. When the ground receiver receives more than 4 satellite signals at the same time, it can calculate the position of the receiver and the current system time to realize positioning. , navigation and timing functions. However, GNSS satellite signals are weak and are extremely susceptible to interference from co-frequency radio radiation sources. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a GNSS interference source positioning method based on grid energy traversal search. [0004] The present invention adopts following technical scheme: [0005] A...

Claims

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Application Information

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IPC IPC(8): G01S19/42
CPCG01S19/42
Inventor 陈奇东甄卫民陶海红张风国刘睿靳睿敏
Owner 中国电波传播研究所
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