研究了线性光纤中色散导致初始频率啁啾的高斯光脉冲展宽的详细物理过程。
The physical process of frequency chirped Gaussian pulses broading induced by the group- velocity dispersion has been studied.
电离层频率调制导致地表面杂波的多谱勒展宽，极大地限制了高频天波雷达的目标探测性能。
Ionospheric frequency modulation causes spreading of the surface clutter in Doppler domain which greatly limits the detection performance of HF sky-wave radars.
通过对传统双路径滤波器的积分支路的改进，使积分支路的可适用频率范围展宽，而低频输出噪声减小。
The integration path can work in wider frequency range and the low frequency output noise is reduced by improving the conventional integration path.
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