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Recent content by sarkararghya

  1. S

    Phase response of of second degree differentiator

    I design a specific second order digital differentiator for a specific application where phase difference must be equal to pi over a specified frequency range. I use the following MATLAB prog. to determine the phase difference. Am I correct ? [H,W]=freqz(B1,A1), plot(W/pi,phase(H))...
  2. S

    Raised cosine IIR Lowpass digital filter

    I want to design a lowpass IIR filter with following specification using "rcosine" MATLAB command. The LPF filter should extract the fundamental component of input signal. cut_off frequency=500Hz Sampling frequency=20000Hz; Roll_off factor=0.6 Delay=2 Cycle of fundamental component...
  3. S

    Question on raised Cosine Low pass Filter

    cosine low I want to design a lowpass IIR filter with following specification using "rcosine" MATLAB command. The LPF filter should extract the fundamental component of input signal. cut_off frequency=500Hz Sampling frequency=20000Hz; Roll_off factor=0.6 Delay=2 Cycle of fundamental...
  4. S

    "Zero crossing detector" circuit req.

    zero crossing detector circuit I need a zero crossing detector circuit which is thermally stable. Can any one help me?
  5. S

    Three phase power measurement

    Hi, I want to measure three-phase active and reactive power for unbalanced non-sinusoidal power signals. For unbalanced system this can be measured as P[/b](act)=V(12)I(1)COS φ(12)+ V(32)I(3)COS φ(32).........(1) P(react)=V(32)I(3)COS φ(32)-V(12)I(1)COS φ(12) .......(2) But at the presence...
  6. S

    realizable structure of a discrete time system

    A discrete time system has been defined as y(n)=(ho x(n)+h1 x(n-1)+h2 x(n-2)+h3 x(n-3))/x(n) where y(n) is the output sequence and x(n) is the input sequence. Is there any realizable structure of this system ? Please help me.
  7. S

    fixed point dsp processor and floating point dsp processor

    What is the difference between fixed point dsp processor and floating point dsp processor?
  8. S

    dsp processor vs microcontroller

    dsp vs microcontroller What is the difference between dsp processor and microcontroller?
  9. S

    difference between digital signal and discrete time signal

    difference between discrete and digital what is the difference between digital signal and discrete time signal?
  10. S

    wavelet analysis of power signal

    For real time power signal analysis, which wavelet is best?
  11. S

    Urgent!! How to get wavelet filter coefficients..

    Please, go through this book Wavelets and Filter Banks Author(s) Gilbert Strang, Truong Nguyen Publisher Wellesley Cambridge
  12. S

    Interview Questions on DSP - Open Thread - Please Contribute

    digital signal processing interview questions In signal processing, why we are much more interested in orthogonal transform?
  13. S

    Help,IIR Wavelet Filter Bank

    Thank you for your reply
  14. S

    Help,IIR Wavelet Filter Bank

    I want to perform on-line multiresolution analysis of real-time signal using wavelet transform. Is it possible to use IIR filter bank? If yes, give some usefull links.
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