基于宽带信号的雷达帧间相关处理技术研究

Research on Radar Interframe Correlation Processing Technology Based on Broadband Signal

相较于窄带雷达,宽带雷达信号带宽大、距离分辨力高,机动目标更容易在不同帧周期间形成跨距离单元走动和出现多普勒色散现象。在雷达回波脉冲间采用频域补偿法进行跨距离单元走动修正和应用ChirpZ变换算法进行多普勒色散校正,然后进行帧间相关处理,以此提高信噪比,提高宽带雷达检测和跟踪性能。通过仿真验证了宽带雷达帧间相关处理算法的有效性。

Compared to narrowband radar,broadband radar has a larger signal bandwidth and higher range resolution,making it easier for maneuvering targets to form cross range unit movement and Doppler dispersion phenomenon during different frame period.The frequency domain compensation method is used for cross range unit walk correction between radar echo pulses,and the ChirpZ transform algorithm is applied for Doppler dispersion correction.Then,interframe correlation processing is performed to improve the signal-to-noise ratio and improve the detection and tracking performance of broadband radar.The effectiveness of the wideband radar inter frame correlation processing algorithm has been verified through simulation.