The Doppler character of the frequency stepped signal is resolved into several elements, and the influence of every element on synthesized range output is analysed in detail.

将频率步进信号的多普勒特性分解为几个基本因素，详细分析了各部分对合成处理距离输出的不同影响。

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This paper presents a synthesized model updating method using the modal parameters and frequency response functions(FRF) extracted from the vibration test data.

文章提出了一种利用模态参数和由振动试验数据求得的频响函数来进行模型修正的方法。

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In the direct digital synthesis of periodic signals, the frequency resolutions and bands of the synthesized signals are limited by the working frequency and data capacity of the synthesizing system.

在利用直接数字式合成方法产生周期信号时，信号的频率分辨率和带宽直接受限于合成系统的工作频率和存储容量。

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