Kalman filter and limited memory filter are described, and a new filter called inertial filter is given, to estimate the velocity of the target.

叙述了卡尔曼滤波和有限记忆滤波算法，并给出对目标速度估计的惯性滤波算法。

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The results show that the fading memory filter makes the position of target in echo images continuous by introducing the influence of old data on image update.

结果表明，渐消记忆滤波器通过引入旧数据对图像更新的影响，使得回波图像中目标位置的变化具有连续性。

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The results show that the fading memory filter makes the position of target in echo images continuous by introducing the influence of old data on image update.

结果表明，渐消记忆滤波器通过引入旧数据对图像更新的影响，使得回波图像中目标位置的变化具有连续性。

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