Windowing

Minimum length of windows and separable signals

Minimum length of windows and separable signals
  1. What is windowing in signal processing?
  2. Which windowing technique is best?
  3. What is windowing in FFT?
  4. What is a window function in DSP?

What is windowing in signal processing?

The process of windowing a signal involves multiplying the time record by a smoothing window of finite length whose amplitude varies smoothly and gradually towards zero at the edges. The length, or time interval, of a smoothing window is defined in terms of number of samples.

Which windowing technique is best?

The Hamming window is preferred by many due to its relatively narrow main lobe width and good attenuation of the first few side lobes.

What is windowing in FFT?

Windowing reduces the amplitude of the discontinuities at the boundaries of each finite sequence acquired by the digitizer. Windowing consists of multiplying the time record by a finite-length window with an amplitude that varies smoothly and gradually toward zero at the edges.

What is a window function in DSP?

Window functions—otherwise known as weighting functions, tapering functions, or apodization functions—are mathematical functions that are zero-valued outside the chosen interval. They are well established as a vital part of digital signal processing.

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