Electromagnetic pulse radar echo simulation method in offshore area

Abstract

The invention relates to an electromagnetic pulse radar echo simulation method in an offshore area. A sea spectrum of an offshore area is established; an ocean surface grid region under a pulse Doppler system is determined and calculated; a scattering field vector of a rough surface element in the ocean surface grid region is calculated by using an electromagnetic algorithm; weighted calculation and simulation of influences on scattering conditions of all parts of the rough surface by a transceiver antenna gain are carried out; and with consideration of the antenna gain, a radar beam back-scattering echo radar equation is established, superposition calculation of scattering field vectors of rough surface elements in the ocean surface grid region is carried out, and thus a radar Doppler echo simulation signal is obtained. Therefore, the need for the electromagnetic property of the coastal environment by the offshore radar system design can be met; lots of manpower and materials are saved by compared with the practical marine measurement; and the reference can be provided for radar detection and anti-jamming algorithm design, parameter selection and performance evaluation. Therefore, the method not only can be used for different sea situation prototype dynamic meeting virtual experiment in an offshore area but also can be used for developing electromagnetic pulse echo scattering mechanism study of the offshore surface.

Description

technical field [0001] The invention relates to the field of modeling and simulation of electromagnetic scattering characteristics of targets and environments, in particular to a method for simulating echoes of electromagnetic pulse radar in near-shore sea areas. Background technique [0002] Offshore waters have become one of the basic patterns of future maritime operations. In the process of radar system development, it is necessary to establish a sea background echo simulation model in the offshore area, which provides the necessary theoretical basis for the research on data acquisition, feature extraction, control and identification of the sea target echo characteristics. At present, the development of radar systems relies on a large number of maritime experiments, which not only consumes a lot of manpower and material resources, but also makes it difficult to grasp the mechanism and laws. At the same time, due to the influence of waves refracted by the coastline, seabe...

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Problems solved by technology

[0003] The invention provides a simulation method of electromagnetic pulse radar echoes in near-shore sea areas, which solves the need for the electromagnetic characteristics of the sea environment in the design of near-sea area radar systems, saves a lot of manpower and material resources compared with the actual measurement at sea, and can effectively provide radar detection and monitoring methods. Anti-jamming algorithm design, parameter selection, and performance evaluation provide references, which can be used for dynamic rendezvous virtual experiments of different sea condition prototypes in coastal waters, and also help to carry out research on the mechanism of electromagnetic pulse echo scattering in coastal seas

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