Task 3 1. a) if hz (n) = cos.n) for 0 sns 7, h2(n) = [1,1,1,1,1,1,1,1) and if h(n) = hi(n). h2(n), calculate DFT of h(n) using convolution method. Hint: H (k) = + (H4(k) ® Hz(k)) (20 Marks) b) Consider the block diagram shown in Figure 7. Develop the difference equation relating the input x[n] and the output y[n]. (5 Marks)
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