A Dsp Board Based Spectrographic Analyzer
نویسندگان
چکیده
A spectrogram is a visual representation of temporal variations in spectral magnitudes at various frequencies of a dynamic signal. The digital spectrographic analysis involves short-time Fourier analysis of the acquired signal, conversion of the spectral magnitudes to dB scale and display of these magnitudes as gray level shades as a function of time and frequency along x and y axes, respectively. In the analyzer developed, a digital signal processing (DSP) board interfaced to a PC is used for carrying out signal acquisition, signal editing, and spectrographic analysis, by properly partitioning the tasks between the PC and the DSP board.
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تاریخ انتشار 2002