TheSub-Band decomposition ofFluctuated signals fortheEstimation ofPowerSpectra
Jiří Zajaček, Lubomír Grmela · 2007
Thenoise spectroscopy isusedtodeterminate quality Samples withgoodtechnology have1/f noise dominant in andreliability ofsemiconductor materials. We haveusedthe frequency range below1Hz.Cut-of frequency isindicator of meansoftime-frequency analysis forprocessing oflongtime quality ofthesample preparation technology. duration stochastic signal. Tree-structured FIRfilter bank In the frequency rangefrom 1Hz to 104 Hz implemented inarecursive wayfor octave dividingfrequency band generation-recombination noise generated bytraps withdeep wasdesigned asfull parallel computational algorithm forPower energylevels andhigheffective cross-section can be Spectral Density esmaon.measured. Fromthermal andfrequency dependence ofnoise obtain highresolution andlowlevel variance ofPSD. maue.Fo hra n rqec eedneo os spectral density thetrapenergy levels andtheir effective Keywords - 1/fnoise, powerspectral density (PSD), FIR,octave cross-section canbedetermined. Thistechnique belongs to filter bank, recursive algorithm.