One form of the deconvolution process starts with the output signal and the filter's impulse response, from which it should be possible to find the input signal. @ If the output of an FIR filter with h[n] = s[n 2] is y[n] = u[n 3] - u[n- 6] determine the input signal x[n]. * If the output of a first-difference FIR filter is y[n] = a[n] - Sn 4] determine the input signal x[n]