Windowed-Sinc Filters

... in some way. Analog(electronic) filters can be used for these same tasks; however, digital filters can achieve farsuperior results. The most popular digital filters are described and compared ... with either analog or digital filters. Whichis better? Analog filters are cheap, fast, and have a large dynamic range inboth amplitude and frequency. Digital filters, in comparison, are vas...

Ngày tải lên: 13/09/2012, 09:50

... variety of recursivefilters in more detail. Be aware that the moving average recursive filter is verydifferent from typical recursive filters. In particular, most recursive filters havean infinitely ... To understand this Chapter 15- Moving Average Filters 283FIGURE 15-4Frequency response of the Blackman windowand Gaussian filter kernels. Both these filtersprovide better stopband attenua...

Ngày tải lên: 13/09/2012, 09:50

... 285CHAPTER16h[i] 'sin(2B fCi )i BWindowed-Sinc FiltersWindowed-sinc filters are used to separate one band of frequencies from another. They are verystable, ... convolution, windowed-sinc filters are easy to program, but slow to execute. Chapter18 shows how the FFT can be used to dramatically improve the computational speed of thesefilters. Strategy of the Windowed-SincFigure ... Fi...

Ngày tải lên: 13/09/2012, 09:50

... 297CHAPTER17Custom FiltersMost filters have one of the four standard frequency responses: low-pass, high-pass, band-passor band-reject. This chapter presents a general method of designing digital filters ... 17-9Example of using three optimal filters. Thesesignals result from filtering the waveform in Fig.17-7 with the filters in Fig. 17-8. Each of thesethree filters is optimal in so...

Ngày tải lên: 13/09/2012, 09:50

... have less performance and flexibilitythan other digital filters. Recursive filters are also called Infinite Impulse Response (IIR) filters, since their impulse responses are composed of decaying ... distinguishes themfrom digital filters carried out by convolution, called Finite Impulse Response (FIR) filters. Thischapter is an introduction to how recursive filters operate, and how s...

Ngày tải lên: 13/09/2012, 09:50

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