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通过分析动目标显示雷达对回波所携带的杂波边带噪声的过滤效应,可求得系统在频域及时域短稳指标对动目标能见度的影响。证明边带噪声被取样后,可在一个取样频带内求得的信杂比能代表整个取样信号的信杂比。说明一个被取样的信号源或一个脉冲振荡信号源不改变其在取样前的固有边带噪声特征。因而可沿用连续波工作方式的一系列分析结果。根据分析而建立的杂波过滤模型,给出测量取样边带噪声及脉冲振荡边带噪声的方法。
By analyzing the filtering effect of the moving target display radar on clutter sideband noise carried by the echo, the influence of the short-term stability index of the system on the visibility of the moving target in the frequency domain and the time domain can be obtained. Proof that sideband noise is sampled, the signal to noise ratio can be obtained within a sampling band can represent the signal-to-noise ratio of the entire sample signal. Explain that a sampled signal source or a pulsed source does not change its inherent sideband noise characteristics prior to sampling. Which can follow a series of continuous wave mode of operation results. According to the clutter filtering model established by the analysis, the methods of measuring the sideband noise of sampling and the sideband noise of pulse oscillation are given.