This symbol represents a response of a filter, meaning the output of a filter when a signal is put through it.
This symbol represents a response of a filter, meaning the output of a filter when a signal is put through it.
The symbol \(y\) represents a response of a filter, meaning the output of a filter when a signal is put through it. For LTI filters, the signal can simply be convolved with the filter, where in the frequency domain, it becomes a multiplication of the fourier transforms of the filter and the signal.