Howtosignalprocessing
- What is overlap save method in DSP?
- Does zero padding improve FFT resolution?
- How to reduce Gibbs phenomenon in dsp?
- What do you mean by Gibbs phenomenon in connection with FIR filter design how its effect can be reduced?
What is overlap save method in DSP?
Overlap–save is the traditional name for an efficient way to evaluate the discrete convolution between a very long signal xn and a finite impulse response FIR filter hn. Given below are the steps of Overlap save method − Let the length of input data block = N = L+M-1. Therefore, DFT and IDFT length = N.
Does zero padding improve FFT resolution?
Zero padding enables you to obtain more accurate amplitude estimates of resolvable signal components. On the other hand, zero padding does not improve the spectral (frequency) resolution of the DFT. The resolution is determined by the number of samples and the sample rate.
How to reduce Gibbs phenomenon in dsp?
The Gibbs phenomenon in a filtered image can be reduced by partitioning the image so that the amplitude of the discontinuity is controlled. The proposed method is efficient and simple in implementation, with fast Fourier transform.
What do you mean by Gibbs phenomenon in connection with FIR filter design how its effect can be reduced?
The Butterworth Low Pass Filter
The discontinuous nature of the ideal low pass filter causes ringing to occur in the filtered output. This phenomenon is known as the Gibbs effect and can be reduced by employing low pass filters which are continuous functions.
