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针对恶劣测量条件下宽频带低信噪比调频连续波雷达信号距离模糊问题,建立了固态料面调频连续波雷达信号模型,并提出了以先验信息为辅助,包含信号频域预处理、频带截取及频带能量加权的距离反演方法.实际数据处理结果显示:经过预处理的信号频谱平均信噪比由原来的-5.55 d B提高到8.32 d B;采用包络线截频带法和最小二乘截频带法进行距离反演后拟合料线与实际料线间的料形相似度由0.46分别提高到0.71和0.79.
In order to solve the ambiguity problem of wideband low signal to noise ratio (FM) CW radar signal under harsh measurement conditions, a signal model of CFD radar signal in solid state is established, and the signal model of signal processing, frequency domain preprocessing, Intercept and band energy weight distance inversion method.The actual data processing results show that: the average signal-to-noise ratio of the pre-processed signal spectrum from the original -5.55 d B to 8.32 d B; using the envelope cut-off band method and the minimum The similarity of material shape between the fitting line and the actual line after the distance inversion by the cut-band method was improved from 0.46 to 0.71 and 0.79 respectively.