A short-wave sky-wave propagation time difference positioning method based on straight-line distance difference

Abstract

The invention provides a short-wave sky-wave propagation time difference positioning method based on the linear distance difference. The present invention pre-acquires the conversion coefficient of the group path of the short wave emitted by the analog radiation source to the receiving station and the straight-line distance between the analog radiation source and the receiving station, and obtains the average conversion coefficient by taking the average value of the conversion coefficients obtained in advance; receiving the target radiation The short-wave signal of the source, and calculate the time difference data from the target radiation source to each receiving station by the generalized cross-correlation method; calculate the coordinates of the target radiation source according to the average conversion coefficient and the time difference data. The invention adds an ionospheric model to the traditional model, uses the actual time difference or path difference to convert into the straight-line distance difference in the traditional model through the average conversion coefficient, and then uses the traditional direct wave model to locate the target radiation source. The invention improves the positioning accuracy of the radiation source.

Description

technical field [0001] The invention relates to the field of radiation source positioning, in particular to a short-wave sky-wave propagation time difference positioning method based on straight-line distance difference. Background technique [0002] With the continuous development of electronic technology, modern electronic warfare increasingly presents a five-dimensional situation of sea, land, air, sky, and electromagnetic. Passive positioning technology is a passive positioning technology. Since the passive detection radar system itself does not emit electromagnetic waves, but receives electromagnetic signals from radiation sources in the detection airspace for positioning, it can also detect and track the enemy while concealing itself. Therefore, once the passive positioning is proposed, it has been widely concerned by all walks of life. [0003] There are two commonly used passive positioning technologies. One is to use a single moving platform to locate the target co...

AI Technical Summary

Problems solved by technology

Directly applying the existing algorithm to the location of the radiation source under the condition of short-wave sky-wave propagation will cause large errors, resulting in unusable positioning results

Images