This is the symbol for a Finite Impulse Response (FIR), the unit Impulse Response (\( \htmlClass{sdt-0000000113}{h} \)) of a FIR filter. Because the result of this happens to be equal to the coefficients of the FIR filter, it is commonly also used to represent the FIR filter.
This is the symbol for a Finite Impulse Response (FIR), the unit Impulse Response (\( \htmlClass{sdt-0000000113}{h} \)) of a FIR filter. Because the result of this happens to be equal to the coefficients of the FIR filter, it is commonly also used to represent the FIR filter.. FIR Filters have no feedback, meaning that its value at any point only depends on current and previous input values, not output values. This makes them inherently stable, meaning that if the input is bounded (will not grow indefinitely), then so is the output.
The symbol \(h\) symbolizes a Finite Impulse Response (FIR), the unit Impulse Response (\( \htmlClass{sdt-0000000113}{h} \)) of a FIR filter. Because the result of this happens to be equal to the coefficients of the FIR filter, it is commonly also used to represent the FIR filter.. FIR Filters have no feedback, meaning that its value at any point only depends on current and previous input values, not output values. This makes them inherently stable, meaning that if the input is bounded (will not grow indefinitely), then so is the output. It acts on the input signal by convolution as can be seen on the associated definition equation page: