fir deci simulation question

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wen
wen 2025 年 2 月 4 日
編集済み: wen 2025 年 2 月 4 日
when trying to do a simulation of FIR decimation simulink block using a chirp block, it doesn't seem the FIR filter out the excessive Hz (ie i still see the full bandwidth). anyone know the proper way to setup a chirp and verify the output of FIR decimation block on spectrum analyzer.
below is my setup.
chirp from 0 to 8Mhz, 100ms sweep & target time, sample time 1/20e6.
spectrum setting as 20Mhz Fs wtih 1024 NFFT
filter dec by 4, direct form, elements as channels

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