Hello I was playing with the Interpolating FIR Filter Block and noticed that the mentioned filter delays tags not properly. What I mean is that when the interpolation factor is different than 1, then the filter delays the tags by the *Sample Delay * Interpolation factor* value. In my opinion this is not correct behavior. Group delay of the filter is constant and the interpolation factor shouldn't affect the process of delaying the tags. Below, I am attaching the plot and GRC flowgraph which demonstrate the problem and where you can see the observed behavior. Number of the taps in RRC filter used in the simulation: 41 Group delay: 20 Actual group delay: 40 What do you think? [image: Rysunek bez nazwy.jpg]
filter_group_delay_compensation.grc
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