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本文首先介绍了多普勒原理和血流多普勒信号模型,推出了壁滤波器设计在彩色超声成像系统中具有极其重要的地位;其次分析了如何通过无限脉冲冲激响应(IIR)滤波器和回归型滤波器设计壁滤波器的原理,其中无限脉冲冲激响应(IIR)滤波器根据初始状态的不同又可以分为零初始化、阶跃初始化和投影初始化三种滤波器;然后根据上述原理分别对各种形式的壁滤波器进行设计,得到它们的频谱图;最后根据频谱图,对这几种壁滤波器进行性能比较,得到它们的优缺点,对从事壁滤波器设计相关的工作者有一定得借鉴意义。
In this paper, the Doppler principle and the Doppler signal model of blood flow are introduced firstly. The wall filter design is introduced to be of great importance in the color ultrasound imaging system. Secondly, we analyze how the Infinite Impulse Impulse Response (IIR) filter And regression filter design wall filter principle, which Infinite Impulse Impulse Response (IIR) filter according to the initial state of different and can be divided into zero initialization, step initialization and projection initialization of the three filters; and then according to the above principle Respectively, the various forms of wall filters were designed to obtain their spectrograms; Finally, according to the spectrum, the performance comparison of these wall filters to get their advantages and disadvantages, engaged in wall filter design related to the workers Have to learn from meaning.