Shipborne HF ground wave radar echo signal simulator
A high-frequency ground wave radar and echo signal technology, which is applied in the direction of instruments, radio wave measurement systems, etc., can solve the problems of inability to simulate echo signals and affect the reception of echo signals, and achieve accurate and accurate simulation of echo signals, expansion Strong performance and flexible system structure
Inactive Publication Date: 2017-04-26
OCEAN UNIV OF CHINA
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During the movement of the ship, it will be shaken by the interference of sea waves and sea wind, which will produce a six-degree-of-freedom movement, and the six-degree-of-freedom movement will affect the direction and amplitude of the radar receiving antenna, thereby affecting the reception of echo signals
Most of the existing shipborne radar simulators do not take the hull motion into the simulation reference factor. A small number of radar simulators consider the hull motion factor, but only consider the influence of the movement of one degree of freedom of the hull on the echo signal, which cannot maximize the Limit true analog echo signal
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[0039] The specific embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described in the specific embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0040] The shipborne high-frequency ground wave radar system is an array radar, the transmitted signal is a linear frequency modulation interrupted continuous wave (FMICW), and the polarization method is vertical polarization. The transmitting antenna and the receiving antenna are installed on the same ship, the transmitting antenna is a log periodic antenna, and the receiving antenna is a uniform linear array.
[0041] Such as figure 1 As shown, under the action of the ...
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A shipborne HF ground wave radar echo signal simulator comprises a parameter setting module and an echo data computing unit; the echo signal computing unit comprises an echo signal amplitude calculation module, an echo signal phase calculation module, a receive antenna receive mode calculation module, a flow field calculation module, a sea surface fusion communication calculation module and an echo signal simulation module. The simulator can form HF ground wave radar echo according to the set flow field, ship geometry parameters, and ship motion parameters; the simulator can be applied to system testing of a shipborne HF ground wave radar echo signal processor, and is suitable for performance testing of an ocean current inverse algorithm.
Description
Technical field [0001] The invention belongs to the technical field of radar simulation testing, and relates to a radar echo signal simulator, specifically, to a shipborne radar echo signal simulator. Background technique [0002] High-frequency over-the-horizon radar uses high-frequency (3~30MHz) electromagnetic waves to diffract and propagate on the surface of conductive oceans with low attenuation. It uses a vertically polarized antenna to radiate radio waves and can detect ships, aircraft and missiles that appear below the line of sight at sea level beyond the line of sight Wait for the sports goal. At the same time, the high-frequency over-the-horizon radar uses the first-order and second-order scattering mechanisms of high-frequency electromagnetic waves on the ocean surface to extract sea state information such as wind field, wave field, and current field from the radar echo. High frequency ground wave radar can be divided into different installation platforms: shore-base...
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Login to View More IPC IPC(8): G01S7/40
CPCG01S7/4056
Inventor黎明牛炯周琳刘兰军常广弘陈倩申晋晋
OwnerOCEAN UNIV OF CHINA