Method and system for radar detection and classification under target and interference conditions
A radar detection and target technology, which is used in radio wave measurement systems, measurement devices, and radio wave reflection/re-radiation to reduce computational complexity and avoid simulation.
Active Publication Date: 2022-04-26
AIR FORCE EARLY WARNING ACADEMY
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[0004] The purpose of the present invention is to provide a radar detection and classification method and system under the conditions of target and interference for the above-mentioned deficiencies in the prior art. Detection and Classification of Subspace Signals and Interference
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[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0036] Assume that the system dimension of the radar system is , therefore, the data to be detected can be used with dimensional column vector express. In the actual environment, the data to be detected The information contained in it has the following three possibilities: one is that it contains only thermal noise and clutter, the other is that it contains thermal noise, clutter and target signals, and the third is that it contains thermal noise, clutter and interference. When the data to be detected contains the target signal, it is assumed that the signal component is located by full-rank mat...
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The present invention provides a radar detection and classification method and system under target and interference conditions. Firstly, the received data and signal matrix are constructed, including the data vector to be detected, the training sample matrix and the signal matrix, and then the interference matrix is constructed according to the signal matrix, and then the Energy detector, and then determine the detection threshold according to the false alarm probability and system parameters, and then compare the size between the energy detector and the detection threshold, if the former is less than or equal to the latter, it is judged that there is neither target nor interference in the data to be detected, otherwise Calculate the ratio detector, if the value of the ratio detector is greater than 1, it is judged that there is a target, otherwise it is judged that there is interference. The energy detector designed in the present invention can take both target and interference into consideration, and realizes the effective judgment of directly judging whether there is a signal or interference without clutter suppression in an unknown clutter environment, and realizes an unknown clutter environment by constructing a ratio detector It is an effective decision to judge whether there is signal or interference in the data to be detected.
Description
technical field [0001] The present invention relates to the field of radar target detection, and more particularly, to a radar detection and classification method and system under target and interference conditions. Background technique [0002] Object detection is one of the most basic and important functions of radar. However, in order to reduce the probability of being detected and located by the radar, the enemy often implements various kinds of interference. This poses a great challenge to the performance of the radar. In addition, there are often clutters whose energy is much stronger than that of the target signal in the data received by the radar. [0003] In order to suppress clutter and determine whether the received data contains targets and interference, the literature (Greco, M. and Gini, F. and Farina, A., “Radar detection and classification of jammingsignals belonging to a cone class,” IEEE Transactions on Signal Processing,2008, vol. 56, no. 5, pp. 1984-19...
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IPC IPC(8): G01S7/41G01S13/04
CPCG01S7/414G01S13/04
Inventor 刘维建黄灿李浩李槟槟张昭建周必雷陈辉王永良
Owner AIR FORCE EARLY WARNING ACADEMY