Now I am trying to design FIR based adaptive filter for rejection of Jamming in GPS device. (just self-learning purpose, Jamming is simple tone)
I've designed NOT-BAD performance adaptive filter for low sampling frequency. (~44100 Hz)
But when I use this adaptive filter for high sampling frequency (16 MHz), transient width of filter is greatly increased. (I think it is sure because transient width is proportional to 1/degree)
Since it is self learning purpose, I just want to know how big sampling frequency of normal GPS signal for digital filtering is.
If it is not so high as above, I'll quit this design and concentrate on other issues(quantization error etc).
If sampling frequency of normal GPS signal is high as above, I'll study more about that issue.
So, my question is :
How high sampling frequency of normal GPS is ?