共查询到20条相似文献,搜索用时 0 毫秒
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The minimisation of the total number of power-of-two terms is considered. The number of terms per coefficient is not constrained. Arbitrary phase filters are also designed where a method is introduced for the optimal utilisation of the filter gain. The method produces much better results than other methods in the literature with low computational requirements 相似文献
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A new architecture for implementing finite-impulse response (FIR) filters using the residue number system (RNS) is detailed. The design is based on using a restricted modulus set, with moduli of the form 2/sup n/,2/sup n/-1, and 2/sup n/+1. This does not restrict the modulus set to the common 3 modulus set {2/sup n/-1,2/sup n/,2/sup n/+1}, but any number of pairwise relatively prime moduli of this form, for example, {5,7,17,31,32,33}. Based on a comparison with a 2's complement design, the new RNS design can offer a significant speed improvement. The gain is obtained by using a set of small moduli, selected so as to minimize critical path delay and area. An algorithmic approach is used to obtain full adder based architectures that are optimized for area and delay. The modulus set is optimum based on cost parameters for each modulus. This new architecture presents a practical approach to implementing a fast RNS FIR filter. 相似文献
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介绍XC2V1000型现场可编程门阵列(FPGA)的主要特性和FIR抽取滤波器的工作原理,重点阐述用XC2V1000实现FIR抽取滤波器的方法,并给出仿真波形和设计特点. 相似文献
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简要介绍了FIR数字滤波器的结构特点和基本原理,提出基于FPGA和DSP Builder的FIR数字滤波器的基本设计流程和实现方案。在Matlab/Simulink环境下,采用DSP Builder模块搭建FIR模型,根据FDATool工具对FIR滤波器进行了设计,然后进行系统级仿真和ModelSim功能仿真,其仿真结果表明其数字滤波器的滤波效果良好。通过SignalCompiler把模型转换成VHDL语言加入到FPGA的硬件设计中,从QuartusⅡ软件中的虚拟逻辑分析工具SignalTapⅡ中得到数字滤波器实时的结果波形图,结果符合预期。 相似文献
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Zhi-Jian Mou 《The Journal of VLSI Signal Processing》1992,4(4):371-377
Symmetric FIR filters, which provide linear phase, are frequently used in digital signal processing. This paper presents a study of structures which take into account the particularities of the symmetry. A novel systolic structure is proposed. An efficient design is presented for the basic module which computes(x±y)h+G and which is only specific to symmetric filters. Special applications of carry-save or signed-digit notations, and tree-type multi-operand adders are shown to significantly enhance the computational speed of symmetric FIR filters. 相似文献
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FIR数字滤波器的FPGA实现研究 总被引:2,自引:0,他引:2
为了研究不同结构的FIR数字滤波器FPGA实现对数字多普勒接收机中FPGA器件资源消耗及其实现的滤波器的速度性能,在Xilinx ISE10.1开发平台中,采用Verilog HDL语言分别实现了FIR数字滤波器的改进的串行结构、并行结构以及DA结构,并在ModelSim仿真验证平台中仿真了实现设计.结果表明,改进串行结构的实现消耗资源少但滤波速度慢,并行结构的实现滤波速度快但消耗资源多,而DA算法的实现速度仅取决于输入数据的宽度,所以滤波速度通常较快且消耗的资源较少. 相似文献
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以窗函数法设计FIR数字滤波器,利用MATLAB工具软件辅助设计和仿真,对信号进行低通滤波,并使用CCS应用软件进行仿真及调试,实现了DSP下数字低通滤波器的设计. 相似文献
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A method for designing optimal symmetric odd-length finite impulse response digital receive filters is proposed. The filter jointly minimises the mean power of intersymbol interference and additive noise or interference under the constraint that the filter coefficients are symmetric. The method yields exactly symmetric filters with the same performance as the earlier unconstrained design but with a lower computational complexity 相似文献
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Kyung-Saeng Kim Kwyro Lee 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》2003,11(1):150-153
This paper describes a 32-tap finite impulse response (FIR) filter with two 16-tap macros suitable for multiple taps. The derived condition for a coded coefficient and data block shows 35% savings in power consumption and 44% improvement in occupied area compared to a typical radix-4 modified Booth algorithm. According to the condition and separated shifting-accessing clock scheme, we have implemented a 32-tap FIR filter in 0.6-/spl mu/m CMOS technology with three levels of metal. The chip that occupies 2.3/spl times/2.5 mm/sup 2/ of silicon area has an operating frequency of 20 MHz and consumes 75 mW at V/sub dd/=3.3 V. 相似文献
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In this paper, we consider an envelope-constrained (EC)H
2 optimal finite impulse response (FIR) filtering problem. Our aim is to design a filter such that theH
2 norm of the filtering error transfer function is minimized subject to the constraint that the filter output with a given input to the signal system is contained or bounded by a prescribed envelope. The filter design problem is formulated as a standard optimization problem with linear matrix inequality (LMI) constraints. Furthermore, by relaxing theH
2 norm constraint, we propose a robust ECFIR filter design algorithm based on the LMI approach. 相似文献
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提出了一种动目标检测滤波器组在FPGA中的设计方法,给出了FIR滤波器组的设计原则和滤波器的设计步骤,并给出一组滤波器的频响曲线,运用该滤波器对某雷达回波数据进行了处理。实现了滤波器组在FPGA中的应用,并就实现过程作出了优化。 相似文献
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