跳频信号中载频的跳变会引起多普勒频率的变化，这对距离的处理产生影响，必须进行速度门的处理。
It will be affect the range processing that the frequency agile of carrier in frequency agile signal arouse the variety of Doppler frequency, so the compensate of velocity door is obligatory.
该方案用平滑的波形来替换前后码元的不连续跳变，从而得到相位连续的时域波形，波形平滑、频谱主瓣窄、滚降速度快。
This scheme uses smooth wave instead of discontinuous wave, so the wave in time field is continuous phase and has good frequency spectrum characteristics.
目前对此问题的解决方法是：在终点处使加速度产生跳变或延长定位时间，而这恰恰影响了数控系统的高速、高精度。
There are some methods to solve the problem, such as making acceleration jumped, delaying orientation time at end-point, these methods affect high-speed and high-accuracy of CNC system exactly.
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