Spectral Characteristics of Random Processes - Random Signals and Processes Primer with MATLAB - page 494

SIGNAL X1: A=1,f1 = 150 Hz

0.2

0.15

0.1

0.05

0

0 100 200 300 400 500

f

SIGNA L X1: A=1,f 1 =150 Hz

10 0

10 -5

10 -10

0 100 200 300 400 500

f

Fig. 7.34 Signal X 1 ( A ¼ 1): PSDs

SIGNA L X2: A=1,f 2 =250 Hz

0.2

0.15

0.1

0.05

0

0 100 200 300 400 500

f

SIGNAL X2: A=1,f2=250 Hz

10 0

10 -5

10 -10

0 100 200 300 400 500

f

Fig. 7.35 Signal X 2 ( A ¼ 1): PSDs

Exercise M.7.3 (MATLAB file exercise_M_7_3.m ) Using the periodogram
method, estimate the PSDs and show the PSD plots for normal white signals with:
1. m ¼ 4 and s 2 ¼ 9.

2. m ¼ 5 and s 2

¼ 16.