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  1. I am designing LPF using FIR IP Core in receiver of Radio. My sampling frequency is 0.96M Hz and cutoff is 4K. I designed the FIR filter using Matlab and used the coefficients in vivado, FIR IP Core. My question is whats the relation between sampling frequency and clock frequency for single rate FIR filter? For 0.96 as sapling frequency and clock frequency my output signal is not getting filtered as shown in second pic. (Carry_d is input where op_dmod is filter output) If i increase the clock frequency to 09.6M (with input sampling 0.96M) the output is a clean sine wave but some sampl