Fig. 5.22a. Theoretical AR(2). 
35.00- 
ra 
dé, =—0.54156 
25.005 G2= 0.81838 
o2= 1.04702 
Fig. 5.22b. Estimated by AR model fitting as optimum AR(2). 
Fig. 5.22. Spectrum for AR(2) process X,-—0.5 X,,+0.8 X.=€), €,: NO, 1]. 
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