Aerial target positioning method based on single vector sensor

Abstract

The invention provides an aerial target positioning method based on a single vector sensor. The method includes the steps: firstly, calculating an azimuth estimation result by the aid of pvz cross spectrum signals; secondly, performing spectrum analysis on vz, and extracting the frequency of corresponding frequency bands. A frequency estimation method is improved by the aid of an LSM algorithm, frequency sequence extraction accuracy and fundamental frequency estimation result accuracy are improved, horizontal direction parameters are estimated, horizontal distance estimation results before and after compensation can be acquired according to a horizontal distance compensation algorithm, minimum distance estimation results are more accurate by a minimum distance matching algorithm when an azimuth angle approaches to a course angle, the influence of angle estimation accuracy to horizontal distance estimation accuracy is reduced by a horizontal distance compensation algorithm, and a horizontal distance estimation result is more accurate. An elevation angle is calculated by a frequency sequence extraction method, and height estimation of an aerial target is achieved based on an elevation angle estimation algorithm, so that three-dimensional positioning of the aerial target is achieved.

Description

technical field [0001] The invention relates to a signal processing method, in particular to an air target positioning method. Background technique [0002] The underwater platform has good maneuverability, large self-sufficiency, endurance and operating radius. However, underwater platforms generally lack effective means of space observation. It is necessary to study how to detect and locate air targets underwater. [0003] Before researching the air target detection and localization algorithm, it is first necessary to study the air target excitation sound field. There are four main ways for air target radiated noise to propagate into water: direct refracted wave direct sound, refracted wave bottom-sea reflected sound, non-uniform wave and scattered wave. There are many studies on the sound field excited by air targets. Hudilnac[1] studied the sound intensity of the underwater sound field excited by the aerial target based on the ray theory, and gave the calculation for...

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Problems solved by technology

However, the second method is affected by environmental conditions, limited by the optical cable between the underwater platform and the buoy, and the underwater platform cannot dive to a greater depth

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