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Spectrum analyzer establishing a nonlinear frequency distribution of power-density spectra
Spectrum analyzer establishing a nonlinear frequency distribution of power-density spectra
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机译:频谱分析仪建立功率密度频谱的非线性频率分布
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摘要
Precalculated samples of a power-density spectrum, taken at equispaced frequencies, are converted into modified samples with a nonlinear (e.g. logarithmic) distribution by being selectively weighted with the aid of several groups of coefficients defining a series of overlapping windows of mutually different widths. The system determines the weighting coefficient whose position in the frequency band of any window is closest to that of a precalculated sample appearing within that window; for each window, any sample appearing therein is multiplied by its closest coefficient and the sum of the resulting products is then divided by a factor proportional to the width of the window.
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