本文研究的雷达视频回波信号模拟与仿真是针对机载下视脉冲多普勒雷达，包括目标信号、地杂波信号和噪声信号的模拟与仿真。

In the thesis, the video echo of the airborne PD radar was simulated. The simulated echoes include the signals of the target, the ground clutter and the noise.

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研究了伪随机信号的特征及伪随机信号产生的方法，得出了用伪随机信号代替白噪声信号辨识钻柱系统脉冲响应的结论。

The results show that the input white noise can be substitute by pseudo-random signals in identifying the impulse response of a drill-string system.

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采用该方法从实际低场脉冲核磁共振系统噪声信号中分离出高斯白噪声并对其进行了参数估计。

The white Gaussian noise was successfully separated from noise signal in low-field pulse NMR system and its parameters were estimated by using this method.

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