医学超声多普勒系统的高通滤波器在消除血管壁搏动带来的回波干扰时，也滤除了低速血流信息。
In medical Doppler ultrasound systems, a high-pass filter is usually employed to remove wall clutter components which may also remove the information of the low velocity blood flow.
在建立回波抵消器模型的基础上，按最小均方误差准则，导出了自适应滤波器抽头的统计梯度算法和抽头调节的收敛公式。
Based on building up a model of echo canceller, the convergence of gradient-type stochastic adjustment algorithm of an adaptive filter under the mean-squared error criterion is discussed.
最后分析了模拟目标回波经脉压滤波器的处理结果。
Finally, the results of the simulated target echo signals passing through a compressed filter are analyzed.
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。
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.
交叉耦合滤波器的综合从给定的传输零点和回波损耗出发，直到得到各腔体之间的耦合系数。
The synthesis of the cross coupled filter is from prescribed transmission zeros and return loss till the attainment of the coupling matrix of each cavity.
本论文主要研究了如何降低高阶自适应滤波器算法的计算复杂度及其在回波消除器中的应用。
The dissertation is focused on the research of reducing the computational complexity of large adaptive filters and their applications in echo cancellation.
这种滤波器适用于ISDN U—接口全双工传输系统中作为自适应回波消除器。
The new adaptive filter can be used as an echo canceller in ISDN U-interface full-duplex transmission system.
非线性预处理是解决多通路回波消除中因输入信号间的强相关性而引起的滤波器不收敛的有效方法。
In the multi-channel echo cancellation, the nonlinear pre-processing is always used to overcome the non-convergence of the filter caused by the strong correlation of input signals.
多路回波消除问题的本质难点是由于多路输入信号之间的强相关性而导致的自适应滤波器解不唯一的问题。
Multi channel acoustic echo cancellation (AEC) systems suffer from the non uniqueness problem of the adaptive identification solution because of the correlation of the input signals.
在天气回波信号谱宽固定的情况下，通过改变天气回波信号的平均多普勒频率，分析了回归滤波器对它的衰减情况。
Fixing the spectrum width of the weather echo signals, we change theirs mean Doppler frequency and filter them using regression filter. After filtering, we analyze the attenuation of them.
根据匹配滤波器输出峰值位置可以获得目标距离的估计，但运动目标径向速度造成的回波和样本失配将导致匹配滤波器检测性能下降。
But the mismatch between echo and replica caused by moving target's radial velocity will degrade the detecting performance of the matched filter.
针对实际采集的雷达回波信号，分析了自适应高斯频域滤波器的地物杂波抑制性能。
Using the actual collected radar echo signals, we analyze the ground clutter suppression performance of the adaptive Gaussian frequency filter.
用一个递归滤波器估计回波平均功率，并计算真实回波和欺骗回波的检测概率，用于相关计算和欺骗终止判断。
The average power of both true skin and deception echo is estimated recursively to calculate the detection probabilities which are used in 2D assignment and RGPO breaking-off judgment.
用一个递归滤波器估计回波平均功率，并计算真实回波和欺骗回波的检测概率，用于相关计算和欺骗终止判断。
The average power of both true skin and deception echo is estimated recursively to calculate the detection probabilities which are used in 2D assignment and RGPO breaking-off judgment.
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