Signal positioning method based on forward attenuation reverse thrust emission amplitude aggregation

Abstract

A signal positioning method based on forward attenuation reverse thrust emission amplitude aggregation includes the steps as follows: (1) an investigation area is set, and mesh generation is carried out on the map of the investigation area; (2) A grid installation signal monitoring stations are randomly taken from the map grid; (3) the signal space attenuation value from a coordinate position (Si,j) to a coordinate position (Sm, n) in the grid is calculated or measured; (4) assuming that there may be suspected signal sources in all the grid positions of the area except the position (Sm, n), the signal source emission amplitude P<I, j><Tk> at the position (Sm, n) is equal to P<m, n><Rk>+D<i, j><Rk>; (5) for A emission amplitudes at the same coordinate position, if there are b emission amplitude values in the confidence interval of [P<I, j><T>(hat)-delta, P<I, j><T>(hat)+delta], it can be judged that the coordinate is the suspected emission coordinate of a signal f0; and (6) all suspected emission coordinates are sorted according to the b value from large to small, wherein the larger the b value is, the larger the possibility that the position is an actual emission coordinate is.

Description

technical field [0001] The invention relates to a signal positioning method based on forward attenuation and reverse deduction of transmission amplitude aggregation, and belongs to the field of signal monitoring. Background technique [0002] With the increase of the number of radio transmission equipment and the density of spectrum coverage, the resources of electric spectrum are increasingly tight. In the face of possible economic losses and even national security, it is particularly important to accurately check radio signal sources or illegal stations to ensure smooth communication. [0003] According to different direction finding principles, modern radio direction finding can be roughly divided into the following four systems: direction finding by amplitude ratio method, direction finding by spatial spectrum estimation method, direction finding by time difference of arrival method and interferometer. (1) Ratio-amplitude direction-finding system: use the directional ch...

AI Technical Summary

Problems solved by technology

Taking the most extensive Watson-Watt system as an example, the advantages are insensitivity to channel interference, fast direction finding speed, and easy implementation, but the direction finding accuracy and direction finding sensitivity of this system are low, and the ability to resist wavefront distortion is weak

(2) The direction finding principle of the spatial spectrum estimation direction finding system: the received signal of each antenna element is compared with the signals of other antenna elements. Taking the typical MUSIC algorithm as an example, this method is used for the radio direction of arrival (Direction of Arrive, abbreviated as DOA) estimation, has the advantages of high direction finding accuracy, small direction finding error, high resolution, and simultaneous orientation of multiple signals, but there are still some defects. For example, when multiple incoming waves are coherent, the MUSIC algorithm failure

[0004] As the electromagnetic environment is getting worse and worse, the positioning method using the above principles will cause the accuracy to decrease, the error will increase, and the positioning algorithm will become more and more complicated.

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