Abstract
A novel coherent integration method for the wideband radar is proposed in this paper based on two-dimensional frequency correction. The method realizes the motion compensation by data re-alignment in the fast time frequency-Doppler domain and can be implemented quickly and efficiently based on chirp-Z transform. The proposed method is validated by simulation and measured data. The work in this paper provides a new and effective way for coherent integration in wideband radar.
Highlights
Modern radars achieve high range resolution by transmitting wideband waveform
In the case of unknown target velocity, how to correct the across range unit (ARU) is a major problem to be solved to achieve the coherent integration of wideband signals and is a research hotspot in wideband radar signal processing
A coherent coherent integration integrationmethod methodfor forthe the wideband radar is proposed in this paper on wideband radar is proposed in this paper basedbased on twotwo-dimensional frequency correction
Summary
Modern radars achieve high range resolution by transmitting wideband waveform. It is well known that pulse integration is an effective method to improve radar target detection performance in a noise background, while coherent integration may obtain better performance than incoherent integration by compensating phase fluctuation among different sampling pulses. With the improvement of range resolution, the motion of target in the coherent processing intervals (CPI) will cause the across range unit (ARU) effect in the wideband case which severely affects the coherent integration performance of the target echo [4,5]. In the case of unknown target velocity, how to correct the ARU is a major problem to be solved to achieve the coherent integration of wideband signals and is a research hotspot in wideband radar signal processing
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