DSP

Consider a six-point decimation-in-time Fast Fourier Transform (FFT) algorithm, for which the signal-flow graph corresponding to X[1] is shown in the figure. Let $W_6 = \exp\left(-...

It is desired to find a three-tap causal filter which gives zero signal as an output to an input of the form $x[n] = c_1 \exp\left(-\frac{j\pi n}{2}\right) + c_2 \exp\left(\frac{j\...

Let $h[n]$ be a length-7 discrete-time finite impulse response filter, given by $h[0] = 4$, $h[1] = 3$, $h[2] = 2$, $h[3] = 1$, $h[-1] = -3$, $h[-2] = -2$, $h[-3] = -1$, and $h[n]$...