External radiation source radar same-frequency interference time delay and energy rapid estimation system and method

Abstract

The invention discloses an external radiation source radar same-frequency interference time delay and energy rapid estimation system and method. The method comprises the following steps that the reference antenna obtains reference signals directly reached by the same-frequency interference base stations through beam forming; the echo antenna receives echo signals containing same-frequency interference and target echoes; a pilot cross-correlation algorithm is usedto obtain coarse time delay parameters of reference signals and same-frequency interference signals, clustering matching processing is performed on the reference signals and the same-frequency interference of each base station, then a same-frequency interference signal matrix is constructed, and a subspace projection method is utilized to obtain two-dimensional accurate estimation of same-frequency interference time delay and energy. The method can achieve the precise estimation of the same-frequency interference time delay andenergy from different radiation sources under the condition of the same-frequency interference of a plurality of radiation sources of the mobile communication external radiation source radar, and further achieves effective inhibition. The invention also discloses an external radiation source radar same-frequency interference time delay and energy rapid estimation system. The system is low in costand convenient in networking.

Description

technical field [0001] The invention belongs to the technical field of radar and relates to radar interference parameter estimation, in particular to a system and method for quickly estimating time delay and energy of external radiation source radar co-frequency interference. [0002] technical background [0003] In recent years, with the gradual opening of low-altitude airspace control and the rapid development of aviation aircraft technology, there have been more and more cases of low-altitude aircraft flying against regulations and being used in terrorist attacks. Improving the ability to detect, identify, track and dispose of low-altitude targets is a guarantee The first prerequisite for low-altitude airspace safety. At present, there are two main ways to solve the problem of low-altitude aircraft detection: photoelectric detection and radar detection. Compared with photoelectric detection, radar has the advantages of strong all-weather detection capability and fast sea...

AI Technical Summary

Problems solved by technology

[0006] However, unlike traditional external radiation source radars, mobile communication external radiation source radars not only have interference from the main base station but also many other co-frequency base station interferences. At present, most of the external radiation source radar interference suppression methods researched at home and abroad are main base station interference suppression methods. , it is difficult to effectively suppress the same-frequency interference in mobile communication external radiation source radar

Images