noise bandwidth การใช้

Reducing the noise bandwidth of the transmitter can also increase energy density.
A flat top window is a partially negative-valued window that has minimal noise bandwidth.
The wider noise bandwidth reduces this 40 dB power saving by 36 MHz / 6 MHz = 8 dB for a substantial net reduction of 32 dB.
What cannot be seen from the graphs is that the rectangular window has the best noise bandwidth, which makes it a good candidate for detecting low-level sinusoids in an otherwise white noise environment.
For a window function with non-zero end-points, such as triangular or Poisson, deleting one of them can result in higher sidelobes and noise bandwidth with little or no main lobe improvement.