A Design Method of Radar Sunny Map with FIR Filter

Abstract

The invention discloses a radar clear day map design method of an FIR filter. According to the method, radar parameter calculation, a radar parameter is calculated according to a work mode and a system parameter of a radar; FIR processing, an antenna is adjusted to a low speed scanning mode, filtering processing of pulse echo is carried out, and ground clutter estimation is calculated; modulo logarithm operation, data is converted into a logarithm which is used for carrying out subsequent target elimination and clutter energy estimation; target elimination, overthreshold processing for sectordata is carried out, and narrow pulse signals of which the number of distance dimensions surpass the threshold are eliminated; distance merging, greatest-selection processing on distance unit data iscarried out to acquire clear day map distance unit data; clear day map correction and update, communication interference influence of a clear day map is eliminated, the clear day map is updated through a clutter map accumulative method, and an accurate clear day map estimate is acquired. The method is advantaged in that a problem of difficulty in carrying out accurate estimation under the static clutter background in the severe weather is solved, and accurately identifying the radar clutter environment to acquire the radar clear day map under the arbitrary weather conditions is guaranteed.

Description

technical field

[0001] The invention relates to a method for designing a radar sky map, in particular to a method for designing a radar sky map with an FIR filter. Background technique

[0002] Radar echoes not only include a large amount of target information, but also include ground clutter, sea clutter, weather clutter, interference and other information. When the radar is working, the clutter echo amplitude in the surrounding environment is usually stored in an orderly manner according to the two-dimensional plane of distance and azimuth, so as to establish a clutter map. The clutter map is used to store the background clutter power of each range-azimuth unit, and the estimated values ​​of different scanning periods are iteratively averaged to calculate the clutter background estimate.

[0003] It is of great significance to carry out the design of the radar clear sky map and establish the radar ground clutter map, estimate the clutter and divide the clutter. The sunny...

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