Any Band-Pass filter may be converted into a tunable filter with a single tuning parameter through the use of a new Tunable Heterodyne Band-Pass Filter concept in which the frequency of the heterodyne signal is adjusted thereby translating the

FFT-based FIR Filter is a unit to perform the finite impulse responce filter based on the Fast Fourier Transform (FFT). It performs the convolution of the unlimited signal sequence with the synthesized impulse responce of the length of Ni=N/2 samples