What is the difference between the sampling frequency of signal and sampling frequency of filter
I sadly don't have the reputation to comment on Fat32's answer, but let me try to answer directly instead: the frequency response of a digital filter is always relative to the processing sampling rate.
So if you design a filter with cutoff at 100Hz and 1kHz sampling rate, then you are really designing for a normalized cutoff frequency $f/f_s$ of 1/10 and whatever the processing rate (ie. the sampling rate of the processed signal), the cutoff will always be 1/10 times the processing rate. If you design a similar filter with cutoff at 200Hz and 2kHz sampling rate, then you will get the same filter.
Now, if you want to filter a signal sampled at 1kHz and you want the cutoff to be 100Hz, then you need to design a filter with a normalized cutoff frequency of 1/10. If you use the same filter on a signal sampled at 2kHz, then the cutoff will be at 200Hz. If you want to keep the cutoff at 100Hz for the 2kHz signal as well, then you need a different filter, this time for a (normalized) frequency of 1/20 instead.
The filter coefficients don't carry any information about the sampling rate, but rather everything is always relative to the sampling rate of the signal you are filtering and this applies to all digital filters, whatever the design method and whether FIR and IIR.