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Altera_Forum's avatar
Altera_Forum
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16 years ago

White Noise Spectrum

I have use a simple LFSR to generare random number to generate white noise. Set of random number are pass through to FFT(power in db vs freq). However, the freq response is increasing at low freq. Th...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

hi,

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However, the freq response is increasing at low freq. Then only maintain roughly flat for higher freq. Is there any problem with increasing at low freq?

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I'd assume, that the decreasing power of the spectrum at lower frequencies is common to all LFSR Generators. You may lower the frequency, where the non-flat part of the spectrum starts, by increasing the length of the LFSR.

cheers,

WK