Scheme iii . a system combining fft algorithm with chirp - z transform to detect feedback rapidly and accurately . then , adopting a filter bank composed of 12 iir narrow - band notch filters to eliminate feedback 采用chirp - z变换( czt )算法与fft算法相结合对声反馈进行检测,使用由12个iir窄带陷波器构成的滤波器组对声反馈进行抑制。
This thesis introduced the parallel and cascade architecture in chapter 6 . a 16 - channel filter bank is designed . it also present the result of this thesis according to the software of matlab and pspice 第六章介绍了串行和并行的滤波器组结构，给出了论文设计的16通道滤波器组，并给出了论文用matlab和pspice作的相应仿真结果。
This paper discusses the design and applications of filter banks , with emphasis on design of linear phase perfect reconstruction filter banks and its application in image denoising <中文摘要> =本论文主要研究了子带滤波器组的设计方法，尤其是具有线性相位特性的完全重构滤波器组的设计，以及完全重构的子带滤波器组在图像消噪中的应用。
The following is the content of this paper : the first chapter introduces the developing history and category of filter , points out the theory and fact meaning , research actuality and application research 本文内容安排如下：第一章介绍了滤波器组的发展历史及分类情况，指出本研究课题的理论及实际意义，给出国内外研究现状及其应用研究。
This dissertation proposes to adopt poly - phase filtering channelized receiver to receive the special multi - carrier ds - cdma signal , which is studied by this dissertation , and use digital matched filter to de - spread signal 在此基础上提出采用多相滤波器组信道化接收机来接收本文研究的多载波扩频通信信号，并使用数字匹配滤波器进行解扩。
Based on the design methods above , we research the possibilities of build nonuniform filter banks with linear phase in the third part , pointing out the difficulties may occur and bringing up our ideas 第三部分，我们在上述两种子带滤波器组设计方法的基础上，探讨了构造非均匀的线性相位滤波器组的可能性，指出了存在的困难，提出了构造的设想。
The orthogonal quasi - interpolation filter preserving approximation order designed by hardin and roach maintain the orthogonality and approximation order of central filter bank and give a proper direction in the design of prefilter Hardin和roach设计的具有逼近阶的正交拟插值预滤波器保持了中心滤波器组的正交性和逼近阶，为预滤波器的设计指出了一条正确的方向。
This method is based on lifting scheme , the initial set of finite biorthogonal filters is followed by lifting and dual lifting , and different lifting operators and dual lifting operators are obtained to construct new wavelet with particular properties 该方法以提升方法为基础，通过对初始双正交滤波器组进行提升和对偶提升，来获得不同的提升算子和对偶提升算子，从而构造出具有理想特性的新小波。
At last , the encoding hardware structure of mpeg - 1 layer ii is put forward . second , in the paper , we have analyzed every module of the structure and estimated it ' s complexity . then the sub - band filter bank and psycho - acoustic modules are more investigated 其次，分析了硬件结构中各个模块并估计了它们的运算复杂性，然后对子带滤波器组和心理声学模型作了进一步的探讨，提出了基于fft的高效实现算法及其硬件结构。
Part two is contributed to the analysis of filter banks in time domain . the representation of each part in filter banks and the perfect reconstruction conditions are introduced here . then the design procedure in time domain and several examples are presented 第二部分，我们研究了滤波器组的时域分析方法，讨论了滤波器组的各个环节在时域中的表示形式，以及滤波器组在时域中的完全重构条件，讨论了滤波器组的时域设计方法，并给出了设计的例子。
