共查询到19条相似文献，搜索用时 312 毫秒
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给出改进的分布式算法实现数字FIR滤波器,用Matlab/Simulink DSPBuilder和QuartusⅡ建模、仿真,以FPGA为硬件载体直接实现FIR滤波器。结果表明该方案既节省了FPGA的硬件资源又提高了系统速率。 相似文献
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提出了一种基于现场可编程门阵列器件FPGA并利用窗函数法实现一个16阶线性FIR．数字滤波器的设计方法。对于在FPGA中实现FIR．滤波器的关键部分——乘加运算,该设计主要采用了将乘加运算转化为查找表的并行分布式算法,与传统串行算法相比,这种方法可极大地减少硬件电路的规模,提高电路的执行速度并且充分利用了FPGA丰富的查表资源。从时域上对基带信号可直接进行成形,因此其实现的滤波器性能优于用DSP和传统方法实现的滤波器,特点是算量较小、精度高,更适用于实时系统。 相似文献
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基于FPGA的FIR数字滤波器的设计与实现 总被引：1，自引：0，他引：1
FIR数字滤波器具有稳定性高、严格的线性相位等特点,因而在现代数字信号处理中得到广泛的应用。文章采用分布式算法,给出了利用现场可编程门阵列器件（FPGA）并采用窗函数的方法来实现FIR滤波器的设计。整个程序采用Verilog HDL语言编写,并在ISE Foundation环境下进行了仿真,结果表明该方法的可行性。 相似文献
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深入分析了某智能网络分析仪数字中频处理中的有限脉冲响应（FIR）数字滤波器的设计原理。设计的FIR滤波器根据设计要求可以改变参数,使得滤波器性能达到最优化,能节省大量编程时间,提高编程效率。该滤波器通带波动小、阻带衰减大,从而证明其算法具有有效性和优越性,阐述了其具体的设计原理及实现方案。 相似文献
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分析有限冲激响应（FIR）滤波器的原理并结合MATLAB工具设计出具有线性相位的FIR滤波器,同时介绍了在TMS320C5510芯片中利用双指针循环寻址实现对称FIR滤波器的算法,并给出相应的程序和仿真结果。 相似文献
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A new design method based on artificial bee colony algorithm for digital IIR filters 总被引：11，自引：0，他引：11
Nurhan Karaboga Author Vitae 《Journal of The Franklin Institute》2009,346(4):328-348
Digital filters can be broadly classified into two groups: recursive (infinite impulse response (IIR)) and non-recursive (finite impulse response (FIR)). An IIR filter can provide a much better performance than the FIR filter having the same number of coefficients. However, IIR filters might have a multi-modal error surface. Therefore, a reliable design method proposed for IIR filters must be based on a global search procedure. Artificial bee colony (ABC) algorithm has been recently introduced for global optimization. The ABC algorithm simulating the intelligent foraging behaviour of honey bee swarm is a simple, robust, and very flexible algorithm. In this work, a new method based on ABC algorithm for designing digital IIR filters is described and its performance is compared with that of a conventional optimization algorithm (LSQ-nonlin) and particle swarm optimization (PSO) algorithm. 相似文献
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设计了利用Matlab与DSP技术相结合的FIR数字滤波器的软件、硬件实现方法、文中采用窗函数法设计FIR数字滤波器．给出了低通滤波器的Matlab仿真波形，介绍了在DSP硬件系统中的实现过程，实现了对信号的FIR滤波处理. 相似文献
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《Journal of The Franklin Institute》2022,359(6):2737-2754
The robust fault estimation problem for linear discrete time-varying (LDTV) systems subject to multiplicative noise is investigated by means of finite impulse response (FIR) filter. A novel analytical redundancy, expressed via all states of the previous time window, is originally established to construct the fault estimator. To ensure the satisfactory fault estimation accuracy in stochastic sense under the interference of random uncertainty, a new performance index in forms of matrix trace function is proposed. An easy-to-check necessary and sufficient condition is presented to obtain the optimal filter gain via minimizing the performance index at each time instant. It is analytically demonstrated that, the newly proposed fault estimation algorithm enjoys obvious computational advantages in updating the filter gain, especially as the length of the time window increases for time-varying systems. Simulation results are finally provided to verify its feasibility and superiority. 相似文献
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Mohammad Shams Esfand Abadi Sima Kadkhodazadeh 《Journal of The Franklin Institute》2011,348(2):212-238
In this paper, the concept of proportionate adaptation is extended to the normalized subband adaptive filter (NSAF), and seven proportionate normalized subband adaptive filter algorithms are established. The proposed algorithms are proportionate normalized subband adaptive filter (PNSAF), μ‐law PNSAF (MPNSAF), improved PNSAF (IPNSAF), the improved IPNSAF (IIPNSAF), the set-membership IPNSAF (SM-IPNSAF), the selective partial update IPNSAF (SPU-IPNSAF), and SM-SPU-IPNSAF which are suitable for sparse system identification in network echo cancellation. When the impulse response of the echo path is sparse, the PNSAF has initial faster convergence than NSAF but slows down dramatically after initial convergence. The MPNSAF algorithm has fast convergence speed during the whole adaptation. The IPNSAF algorithm is suitable for both sparse and dispersive impulse responses. The SM-IPNSAF exhibits good performance with significant reduction in the overall computational complexity compared with the ordinary IPNSAF. In SPU-IPNSAF, the filter coefficients are partially updated rather than the entire filter at every adaptation. In SM-SPU-IPNSAF algorithm, the concepts of SM and SPU are combined which leads to a reduction in computational complexity. The simulation results show good performance of the proposed algorithms. 相似文献
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本文介绍了可进化硬件的机理和相关技术,阐述了一种基于进化论中遗传算法的大规模电子电路设计方法,用可进化硬件设计出了有限冲击响应数字滤波FIR系统,利用VHDL语言在QUARTUSII对设计进行仿真,得到了较好的效果关键词:遗传算法;可进化硬件;FIR;EHW;FPGA;VHDL 相似文献
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Engin Bozdag 《Ethics and Information Technology》2013,15(3):209-227
Online information intermediaries such as Facebook and Google are slowly replacing traditional media channels thereby partly becoming the gatekeepers of our society. To deal with the growing amount of information on the social web and the burden it brings on the average user, these gatekeepers recently started to introduce personalization features, algorithms that filter information per individual. In this paper we show that these online services that filter information are not merely algorithms. Humans not only affect the design of the algorithms, but they also can manually influence the filtering process even when the algorithm is operational. We further analyze filtering processes in detail, show how personalization connects to other filtering techniques, and show that both human and technical biases are present in today’s emergent gatekeepers. We use the existing literature on gatekeeping and search engine bias and provide a model of algorithmic gatekeeping. 相似文献
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《Journal of The Franklin Institute》2022,359(17):10172-10205
Recently, the sparsity-aware sign subband adaptive filter algorithm with individual-weighting-factors (S-IWF-SSAF) was devised. To accomplish performance enhancement, the variable parameter S-IWF-SSAF (VP-S-IWF-SSAF) algorithm was developed through optimizing the step-size and penalty factor, respectively. Different from the optimization scheme, we devise a family of variable step-size strategy S-IWF-SSAF (VSS-S-IWF-SSAF) algorithms based on the transient model of algorithms via minimizing the mean-square deviation (MSD) on each iteration with some reasonable and frequently adopted assumptions and Price's theorem. And in order to enhance the tracking capability, an effective reset mechanism is also incorporated into the proposed algorithms. It is worth mentioning that the presented algorithms could acquire lower computational requirements and exhibit higher steady-state estimation accuracy obviously and acceptable tracking characteristic in comparison to the VP-S-IWF-SSAF algorithm. In addition, the stable step-size range in the mean and mean square sense and steady-state performance are concluded. And the computational requirements are exhibited as well. Monte-Carlo simulations for system identification and adaptive echo cancellation applications certify the proposed algorithms acquire superior performance in contrast to other related algorithms within various system inputs under impulsive interference environments. 相似文献
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《Journal of The Franklin Institute》2022,359(3):1274-1302
This article proposes an affine-projection-like maximum correntropy (APLMC) algorithm for robust adaptive filtering. The proposed APLMC algorithm is derived by using the objective function based on the maximum correntropy criterion (MCC), which can availably suppress the bad effects of impulsive noise on filter weight updates. But the overall performance of the APLMC algorithm may be decreased when the input signal is polluted by noise. To compensate for the deviation of the APLMC algorithm in the input noise interference environment, the bias compensation (BC) method is introduced. Therefore, the bias-compensated APLMC (BC-APLMC) algorithm is presented. Besides, the convergence of the BC-APLMC algorithm in the mean and the mean square sense is studied, which provides a constraint range for the step-size. Computer simulation results show that the APLMC, and BC-APLMC algorithms are valid in acoustic echo cancellation and system identification applications. It also shows that the proposed algorithms are robust in the presence of input noise and impulse noise. 相似文献