共查询到20条相似文献,搜索用时 46 毫秒
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介绍了匹配滤波器原理,分析了匹配滤波并行处理的算法,提出了一种适合高速处理的并行数字匹配滤波器的设计方法。使用Matlab软件进行了仿真,根据仿真结果证明了此设计方法可行。给出了利用可编程门阵列(Field-Programmable Gate Array,FPGA)实现16阶高速并行数字匹配滤波器的方案,指出了实现的要点。在系统中进行了性能测试,结果表明,采用该并行处理算法实现的数字匹配滤波器适合高速信号处理。 相似文献
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A Kalman filter for tracking moving objects has been implemented on a TMS32010 digital signal processor. Tracking accuracy and quantization effects of the implementation have been measured by comparing the filter to one implemented on a general-purpose computer with a 32 bit word length. The filter design has been optimized to minimize the program memory requirements and execution speed. Although the filter has been implemented on a specific signal processing chip, the design is general enough to be applicable to any other digital signal processor. The filter can be used for tracking objects for industrial or other applications where range and bearing measurements are available. For motion on a plane, the filter can be used to track objects where the maximum system bandwidth is 1680 Hz; for three-dimensional motion the system bandwidth is 1120 Hz. Using the approach presented, higher system bandwidth can be accommodated through higher-speed digital signal processors 相似文献
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FIR数字滤波器广泛应用于实时数字信号处理领域.本文介绍了FIR数字滤波器的结构、特点及设计方法,并采用窗函数法设汁了FIR滤波器.利用TMS320VC5509 DSP芯片强大的数字信号处理功能实现了该滤波器.实验表明,此数字滤波器工作稳定,能够满足实时的滤波处理功能. 相似文献
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基于FPGA的高速数字FIR滤波器设计 总被引:2,自引:0,他引:2
本文在分析传统FIR数字滤波器的基础上,设计了一种面向时序和面积优化的高速数字FIR滤波器结构。和传统的数字FIR滤波器比较,该结构具有速度快,面积小,易于扩展等特点。采用该结构,实现了一个基于FPGA的14阶的数字FIR滤波器。 相似文献
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整个电路采用标准CMOS工艺,采取模块化设计的方法,把数字频率发生器和模拟滤波器部分分开设计。数字频率发生器采用直接数字综合(DDS)的方式,来产生5种不同中心频率(10个通道),简化了传统模拟压控振荡器(VCO)的设计,提高了频率发生器的灵活性;根据精度要求,模拟高斯低通滤波器采用5阶低通滤波器来进行逼近。并论述和讨论了一种用数字和模拟混合集成电路来实现一维模拟输入的连续小波变换(CWT)芯片的方法。 相似文献
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Miroslav D. Lutovac Jelena D. Ćertić Ljiljana D. Milić 《Circuits, Systems, and Signal Processing》2010,29(1):51-64
Digital filter design can be performed very efficiently using modern computer tools. The drawback of the numeric-based tools
is that they usually generate a tremendous amount of numeric data, and the user might easily lose insight into the phenomenon
being investigated. The computer algebra systems successfully overcome some problems encountered in the traditional numeric-only
approach. In this paper, we introduce an original approach to algorithm development and digital filter design using a computer
algebra system. The main result of the paper is the development of an algorithm for an infinite impulse response (IIR) filter
design that, theoretically, is impossible to be implemented using the traditional approach. We present a step-by-step procedure
which includes derivations of closed-form expressions for (1) the transfer functions of the implemented digital filter which
contains the algebraic loop; (2) the closed-form expression for computing the number of requested iteration steps; and (3) the
error function representing the difference of the output sample values of the new filter and that of the conventional filter.
We demonstrate how one can use some already-known multiplierless digital filter as a start-up filter to design a new digital
filter whose passband edge frequency can be simply moved by using a single parameter. As a result, we obtain a multiplierless
IIR filter, which belongs to the family of low-power digital filters where multipliers are replaced with a small number of
adders and shifters. 相似文献
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Park T.H. Youn D.H. Cha I.W. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1988,76(5):632-634
The authors update delta modulation digital filter weights using the LMS (least-mean-squares) and the SIGN algorithms to realize an adaptive digital filter without multiplication operations. It is shown that using the SIGN algorithm results in an adaptive filter that can be implemented using the simple up/down counting operations. Learning curves demonstrating convergence properties of the algorithms for a system identification problem are presented 相似文献
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TD-SCDMA中FIR滤波器的DSP实现 总被引:5,自引:5,他引:0
文中首先说明了TD-SCDMA标准中对FIR滤波器的性能要求.同时以TD-SCDMA中的FIR滤波器为例,说明了数字滤波器的基本原理,讨论了如何应用MATLAB进行数字滤波器的设计,以及数字滤波器的DSP实现的基本思想,在实现过程中与MATLAB的结合.针对TI公司TM320C55X系列芯片进行汇编语言设计,平衡了设计精度和存储空间的要求,具有占用存储空间少,运行速度快的优点,更好地适应实时滤波的场合. 相似文献
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多频带数字滤波器的设计和FPGA实现 总被引:1,自引:1,他引:0
本文介绍了一种应用于FPGA芯片的多频带数字滤波器的快速高效的设计、验证和实现的方法,该方法不同于传统的FPGA滤波器设计而且十分实用能大大缩短开发周期。首先根据多频带数字滤波器的性能要求,介绍了在具体性能指标下的多频带数字滤波在FPGA中实现的思想和原理,接下来描述了FPGA数字滤波器的传统设计方法和MATLAB设计方法,解释了采用极小化极大准则对滤波器的频率响应进行逼近的原理,然后结合一个具体的多频带数字滤波器的设计,给出了利用MATLAB进行多频带滤波器设计的过程以及HDL代码的生成步骤,最后介绍了该多频带滤波器在Modelsim中的RTL级仿真和在FPGA芯片中的门级实现。 相似文献
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MATLAB-DSP集成环境下的FIR数字滤波器设计 总被引:3,自引:1,他引:2
文章介绍了有限冲激响应(FIR)数字滤波器的原理,以及如何根据工程中所给的参数设计所需的FIR数字滤波器。在MATLAB环境下完成FIR数字滤波器的设计与分析,利用CCSIDE完成数字滤波器的实现,通过CCSLink这一高效的工具完成MATLAB与DSP之间的实时数据传送,在不影响DSP运行的情况下完成DSP的开发。利用这一技术可以快速地对DSP进行控制与调试,极大地缩短了DSP的开发周期,提高了DSP的开发效率。 相似文献
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Traditionally, analog circuits have been used for signal conditioning of electrocardiograms. As an alternative, algorithms implemented as programs on microprocessors can do similar filtering tasks. Also, digital filter algorithms can perform processes that are difficult or impossible using analog techniques. Presented here are a set of real-time digital filters each implemented as a subroutine. By calling these subroutines in an appropriate sequence, a user can cascade filters together to implement a desired filtering task on a single microprocessor. Included are an adaptive 60-Hz interference filter, two low-pass filters, a high-pass filter for eliminating dc offset in an ECG, an ECG data reduction algorithm, band-pass filters for use in QRS detection, and a derivative-based QRS detection algorithm. These filters achieve real-time speeds by requiring only integer arithmetic. They can be implemented on a diversity of available microprocessors. 相似文献
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To solve the difficulty of designing digital impacting filter in the receiver of random-polar modulated Extended Binary Phase Shift Keying with Continuous Phase (CP-EBPSK), a design method based on Quantum-behaved Particle Swarm Optimization (QPSO) algorithm is proposed. Firstly, QPSO is introduced elaborately, and the basic flow of QPSO is also given. Then, the demodulation principle of digital impacting filter in the communication system of CP-EBPSK with random-polar is demonstrated, and QPSO is utilized to design the digital impacting filter, which also takes the effect of finite word length into consideration when implemented by hardware. Finally, the proposed method is simulated. Simulation results show that the digital impacting filter designed by new method can derive satisfied demodulation performance. 相似文献
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This article presents a fully digital controller for a three-phase shunt active filter. The harmonic isolator and the current controller both have been implemented in only one Field Programmable Gate Array (FPGA). This article discusses the design and implementation of digital hybrid modulated hysteresis current controller and multi-variable filters for shunt active filter controlling. Simulation and experimental results based on ‘FPGA in the loop’ prototyping demonstrate the effectiveness of the proposed fully digital controller. 相似文献
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