Question

12. Calculate the DFT of the following discrete-time signal with: x[0] = 1, x[1] = 2, x[2] =-3, x[3] = 0. The value of the DFT required for this question is X(1). (c) 4-j2, (d) not (a), not (b) and not (e). (6) 2-4, (a) 2 + j3, 13. Determine the finite length sequence, xfn] from the DFT sequence X[k]={10,15, 40,-5). Only the discrete-time signal value at x[0] is required for this question. (a) 6+j4 (b) 15, (c) 4+j4, (d) not (a), not (b) and not (e) omance. xfn] from the DFT sequence X[] = {20,10,- 5.-15). Only action

Answer 1

********please RATE answer !!

260) X(1) 2()*(3) n) = [1,2,-3,0 ] (2 nzo - 2n CO By 4 point Pet natuíx, We can get of 5 sequence from ) rX10) 1 si 1 1 1 1 X(1) T1 -j tj nements !! X(2) 2 1 - 1 - X(3) J L' j - 1 - 1 element (1) (2) X(0)2 ] XX (0) - jx200) - 1X0(2) + jx(366)] | 2 | 31 - 32 –| X(-3)+) X 0 21 - 2; +3 CX(1)] 24-2; /OPTION ② CORRECT !! (13) DRT sequence a X[k] 2 10, 15,40,54 xcon in Xo) K DFT X(R) Ti j - -; Xi) Sequence 4 I-II- [X13) L'-;- ; 201) 1(2) X (2) 2 (0)2 5 Tax xo))+(1 X (««)) +cix X2) +{1x (XCD)) 27 [X(0) + X(1) +x(2) + X(3)] 2 / ( 10 + 15 +40-5) / [60] =(15) (X(0)2 15 Y Orion ® CORRECT !!