A method of sub-band correlation registration for high-speed moving targets

Abstract

The invention discloses a sub-band correlation registration method of a high-speed moving target, aiming to solve the problem that the prior art does not consider establishing a correlation registration model between sub-band signals of the target in the case of high-speed movement. Sub-band correlation registration method under high-speed target; this application uses radar transmission signals of different bands and target motion information to establish a broadband radar echo model, estimates the speed of the target according to the minimum entropy criterion, and performs speed compensation on the echo signal , and estimate the non-correlated phase factor, and compensate the estimated non-correlated factor to the non-reference subband; this application considers that the radar target is moving at high speed, which is more in line with the actual military needs, and the speed compensation for the moving target reduces the Due to the influence of one-dimensional range image distortion caused by the high-speed motion of the target, the estimation of subsequent correlation factors is more accurate, and high-precision parameter estimation is achieved at the same time; the present application is applicable to the technical field of sub-band synthesis forming ultra-wideband.

Description

technical field [0001] The invention relates to the technical category of sub-band synthesis to form ultra-wideband, in particular, it provides a method for carrying out correlation registration between sub-bands under the condition of high-speed motion of a target. Background technique [0002] In recent years, broadband radar has been widely used in radar imaging, ballistic missile defense, space detection and so on. Although they have a fairly high resolution, they are much smaller than the range-resolution units for fine target structures such as missiles, aircraft, and satellites. One can improve the range resolution by increasing the bandwidth, but a large emission bandwidth will lead to an increase in the complexity of the radar system and a significant increase in design cost. Therefore, without changing the configuration of a single radar, the target frequency responses of different frequency bands measured by multiple existing radars are used to synthesize a frequ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the prior art does not consider the establishment of the sub-band signal correlation registration model under the condition of high-speed motion of the target, and the present invention provides a sub-band correlation registration method under the high-speed moving target

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