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1.
高阶带通滤波器设计研究 总被引:4,自引:0,他引:4
本文详细讨论了FIR线性相位滤汉器幅频特性与神经网络算法之间的关系,证明了神经网络的收敛性条件,给出了FIR高阶带通滤波器的设计实例,研究结果表明该算法在高阶带通滤波器的优化设计中的有效性和优异性能。 相似文献
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本文介绍了发夹式微带带通滤波器的基本原理、组成结构及设计方法,利用ADS仿真器设计、制作了一个4.4GHz-5GHz的带通滤波器并给出了仿真和实测的对比结果. 相似文献
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本文讨论两种高阶带通滤波器的设计方法,用这两种方法可以简化滤波器的数学设计过程,并可利用LTCs系列开关电容滤波器(LTC1059、60、61、64)实现高质量的带通滤波器。 相似文献
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本文的目标是设计制作一个中心频率为3.0GHz,通带200MHz。插入损耗小于3.5dB的微带带通滤波器。本文首先阐述了微带滤波器的工作原理、设计方法,接着介绍了该微带滤波器的设计过程。最后给出实物测试结果。 相似文献
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用级联二阶节设计高阶带通滤波器的一种简单方法(续)解放军广州通信学院陈俊一,单严,王光祥(上接95年第2期)4.单个二阶带通滤波器增益特性与相位特性LTC1059,60,61,64中的每个二阶节的输出和教科书中的带通滤波器的增益与相位响应十分近似。其... 相似文献
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何怡刚 《固体电子学研究与进展》1997,17(1):72-76
提出一种高阶全极点运算跨导放大器-C滤波器系统生成方法,能方便地设计出全极点高通、低通和带通滤波器。该滤波器与MOS工艺兼容,便于单片集成。滤波器设计实例和PSPICE模拟结果表明所提方法是正确的。 相似文献
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本文给出了一种设计高Q高阶有源通滤波器的方法,并利用计算机的优化方法,使设计的滤波器获得了国为理想的结果,该电路具有性能稳定可靠,调试方便体积小等优点,适用于模快化设计。 相似文献
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提出了一种新的电流模式高阶OTA—C高通滤波器的设计方法。由该方法导出的滤波器具有最少的元件.n阶滤波器仅需n个OTAs和n个电容,所有的电容均接地,便于集成且与VLSI工艺兼容。文中给出了6阶滤波器设计实例,PSPICE仿真结果与理论分析相吻合,验证了该设计方法的可行性。 相似文献
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In this investigation, subfilters are cascaded in the design of a 2-D narrow transition band FIR digital filter with double
transformations, a transformation from wide transition band subfilter into 1-D narrow transition band filter and a McClellan
transformation from 1-D filter into 2-D filter. The traditional method for designing a 2-D FIR digital filter with a narrow
transition band yields very high orders. The difficulty of the design and implementation will increase with orders exponentially.
Numerous identical low-order subfilters are cascaded together to simplify the design of a high-order 2-D filter compared to
traditional design method. A powerful genetic algorithm (GA) is presented to determine the best coefficients of the McClellan
transformation. It can be used to design any contours of arbitrary shape for mapping 1-D to 2-D FIR filters very effectively.
A generalized McClellan transformation is presented, and can be used to design 2-D complex FIR filters. Various numerical
design examples are presented to demonstrate the usefulness and effectiveness of the presented approach.
相似文献
Shian-Tang Tzeng (Corresponding author)Email: |
12.
In this paper we present a new and numerically efficient technique for designing 2-D linear phase octagonally symmetric digital filters using Schur decomposition method (SDM) and the diagonal symmetry of the 2-D impulse response specifications. This technique is based on two steps. First, the 2-D impulse response matrix is decomposed into a parallel realization of k sections, each comprising two cascaded linear phase SISO 1-D FIR digital filters. It is shown that using the symmetry property of the 2-D impulse response matrix and the fact that the left and right eigenspaces obtained by SDM are transpose of each other, the design problem of two 1-D digital filters is reduced to the design problem of only one 1-D digital filter in each section. 相似文献
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Flexible design of multidimensional perfect reconstruction FIR2-band filters using transformations of variables 总被引:3,自引:0,他引:3
An approach to designing multidimensional linear-phase FIR diamond subband filters having the perfect reconstruction property is presented. It is based on a transformation of variables technique and is equivalent to the generalized McClellan transformation. Methods for designing a whole class of transformation are given. The approach consists of two parts; design of the transformation and design of the 1-D filters. The use of Lagrange halfband filters to design the 1-D filters is discussed. The modification of a particular Lagrange halfband filter which gives a pair of simple 1-D filters that are almost similar to each other in their frequency characteristics but still form a perfect reconstruction pair is presented. The design technique is extended to other types of two-channel sampling lattice and subband shapes, in particular, the parallelogram and the diagonally quadrant subband cases. Several numerical design examples are presented to illustrate the flexibility of the design method. 相似文献
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Two-Dimensional Farrow Structure and the Design of Variable Fractional-Delay 2-D FIR Digital Filters
《IEEE transactions on circuits and systems. I, Regular papers》2009,56(2):395-404
15.
It is shown that the singular-value decomposition (SVD) of the sampled amplitude response of a two-dimensional (2-D) digital filter possesses a special structure: every singular vector is either mirror-image symmetric or antisymmetric with respect to its midpoint. Consequently, the SVD can be applied along with 1-D finite impulse response (FIR) techniques for the design of linear-phase 2-D filters with arbitrary prescribed amplitude responses which are symmetrical with respect to the origin of the (ωΨω2) plane. The balanced approximation method is applied to linear-phase 2-D FIR filters of the type that may be obtained by using the SVD method. The method leads to economical and computationally efficient filters, usually infinite impulse response filters, which have prescribed amplitude responses and whose phase responses are approximately linear 相似文献
16.
Angelidis E. Diamessis J. 《Vision, Image and Signal Processing, IEE Proceedings -》1994,141(6):365-372
A novel frequency-sampling method for designing 2-D real-coefficient FIR filters, given the values and slope estimates of the desired frequency response at each of the node points of a rectangular grid, is presented. Based on a new class of bivariate Hermite-type polynomials suitable for interpolating at complex conjugate points, and using Kronecker products, the original 2-D filter design problem is reduced to the solution of two 1-D systems of linear equations. Additional advantages of the method are the securing of the existence and uniqueness of the solution of the design problem, computational efficiency, the use of simple and recursive 1-D algorithms; the guarantee of real accurate results; and the inherent parallelism. The method is also applied to design 2-D symmetric FIR filters and can be extended to m-D design problems 相似文献
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Eigenfilter approach for the design of variable fractional delay FIR and all-pass filters 总被引:1,自引:0,他引:1
An eigenfilter approach is presented for designing 1-D and 2-D variable fractional delay FIR and all-pass filters. First, the coefficients of filters are expressed as a polynomial of the fractional delay parameter. Then, the optimal polynomial coefficients are obtained from the elements of the eigenvector corresponding to the minimum eigenvalue of a real, symmetric and positive definite matrix. Finally, several design examples of 1-D and 2-D variable fractional delay FIR and all-pass filters are used to illustrate the effectiveness of the eigenfilter approach. 相似文献
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Tian-Bo Deng Takashi Soma Jun Murakami Yoshiaki Tadokoro 《Multidimensional Systems and Signal Processing》1994,5(1):97-119
In designing two-dimensional (2-D) digital filters in the frequency domain, an efficient technique is to first decompose the given 2-D frequency domain design specifications into one-dimensional (1-D) ones, and then approximate the resulting 1-D magnitude specifications using the well-developed 1-D filter design techniques. Finally, by interconnecting the designed 1-D filters one can obtain a 2-D digital filter. However, since the magnitude responses of digital filters must be nonnegative, it is required that the decomposition of 2-D magnitude specifications result in nonnegative 1-D magnitude specifications. We call such a decomposition the nonnegative decomposition. This paper proposes a nonnegative decomposition method for decomposing the given 2-D magnitude specifications into 1-D ones, and then transforms the problem of designing a 2-D digital filter into that of designing 1-D filters. Consequently, the original problem of designing a 2-D filter is significantly simplified. 相似文献
19.
《Signal Processing, IEEE Transactions on》2009,57(2):551-564
20.
本文提出了一种设计一维线性相位FIR数字滤波器的新方法。该方法采用频域的最小平方误差函数使所求的增益特性逼近所希望的增益特性 ,其计算公式非常简单 ,并可设计任意形状增益特性的FIR数字滤波器。设计实例表明提出的方法非常有效 相似文献