导出了信号截获因子与信号参数的关系，认为大的时间带宽积是低截获概率信号的必要条件。

The relation between the interception factor and signal parameters is deduced. Large time bandwidth (TB) product is a necessary condition for an LPI signal.

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随后以大擦地角的回波信号为例，简要分析了杂波模型的幅度分布、功率谱和参数的特性。

The amplitude distribution, power spectrum and parameters are discussed briefly based on the return at a high grazing angle.

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用研制出的大信号建模软件提取了功率FET的大信号模型参数，并用该模型模拟和测量了器件大信号s参数，结果完全一致。

We developed a general large signal modeling software and extracted the power FET model parameters. The parameters are well coincide with simulated and measured large signal s parameters.

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