Moving Average 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...

Ngày tải lên: 13/09/2012, 09:50

... [84] 5Moving Average FiltersThe moving average is the most common filter in DSP, mainly because it is the easiest digitalfilter to understand and use. In spite of its simplicity, the moving average ... point moving averageFIGURE 15-1Example of a moving average filter. In (a), arectangular pulse is buried in random noise. In(b) and (c), this signal is filtered with 11 and 5...

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 ... Signal Processing292...

Ngày tải lên: 13/09/2012, 09:50

... using these filters on the examplewaveform of Fig. 17-7a.The moving average filter is the topic of Chapter 15. As you recall, eachoutput point produced by the moving average filter is the average ... 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 some sense. In (a), th...

Ngày tải lên: 13/09/2012, 09:50

... Blackman and Gaussianfilters (relatives of the moving average, Chapter 15), but with a much fasterexecution speed. The design equations for a four stage low-pass filter are:Narrow-band FiltersA common ... distinguishes themfrom digital filters carried out by convolution, called Finite Impulse Response (FIR) filters. Thischapter is an introduction to how recursive filters operate...

Ngày tải lên: 13/09/2012, 09:50

... The diagram below shows the average hours of unpaid work per week done by people in different categories. (Unpaid work refers ... per week in such tasks as housework and gardening. Men's contribution to these unpaid jobs averages a considerably lower 18 hours. When children enter the household, however, the inequality

Ngày tải lên: 04/10/2012, 10:02

... smaller crews. The average capacity of aU.S. liner ship was approximately 30,000 deadweighttons (DWT), compared to 12,000 DWT in 1970.Crews of 21 mariners (down from an average of 35)function ... pursuit oftransportation excellence and innovation.ECONOMIC PERSPECTIVESInternational Transportation: Moving the GlobalEconomy ForwardU.S. DEPARTMENT OF STATE ELECTRONIC JOURNAL...

Ngày tải lên: 24/10/2012, 14:37

... Average Jones by Samuel Hopkins Adams Web-Books.Com Average Jones I. The B-Flat Trombone ................................................................................................................3 ... "What's that?" asked Average Jones with awakened interest. "Only a quack medical concern looking for a stall to impress their come-ons," explaine...

Ngày tải lên: 06/11/2012, 16:13

... Đường trung bình (Moving Averages) Một đường trung bình là cách làm phẳng hoạt động biến động giá theo thời gian. Nghĩa ... nhấp nhô hơn thì phản ánh sự biến động giá nhanh hơn. 5.1 Đường trung bình đơn giản (Simple Moving Average - SMA) Một đường trung bình đơn giản là kiểu đường trung bình đơn giản nhất. Một cách ... và chúng ta có thể đưa ra dự đoán giá tương lai. 5.2 Đường trung bình...

Ngày tải lên: 04/04/2013, 15:33

... Hàm AVERAGE( ) và AVERAGEA() Tính trung bình (trung bình cộng) của các số. Cú pháp: = AVERAGE( number1, number2, ...) number1, number2, ... : ... • Nếu cần tính trung bình cả các giá trị logic và các giá trị text thể hiện số, bạn sử dụng hàm AVERAGEA(), với cùng cú pháp. Trích: Với Excel 2007, để liếc nhanh qua giá trị trung bình, bạn chỉ

Ngày tải lên: 16/09/2013, 05:10