而声表面波延迟线输入输出载频不变，并能始终保持脉冲的相参性，用于PD雷达欺骗干扰，是实用的方案。
The input and output carrier of SAW delay line is constant to maintain the coherence of the pulse, which can be well applied for deception jamming in PD radar.
阐述了一种利用消失矩条件和线性时不变系统的状态方程来构造小波的方法。
Motivated by the filter reconstruction and vanish-moment conditions, a general construction approach based on the state equation was proposed for linear time-invariant systems.
但是，原始的轮廓波变换由于采用拉普拉斯塔式变换而存在一定的冗余度，并且缺乏平移不变性，因此在图像处理等应用中具有其局限性。
However, the original contourlet transform has a certain redundancy and lacks translation invariance, it tends to have its limitation in the applications such as image processing.
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