Electronics and Communication Engineering - Signals and Systems - Discussion
Discussion Forum : Signals and Systems - Section 10 (Q.No. 6)
6.
The power in the signal s(t) = 8 cos (20 p - p/2) + 4 sin (15 pt) is
Discussion:
2 comments Page 1 of 1.
Vishnu said:
4 years ago
Find energy and power of x(t) =8cos (4t) cos (6t).
(1)
Shanmugaraja said:
10 years ago
s(t) = 8 cos(20p - p/2)+4 sin(15 pt) is:
Let x1(t) = 8 cos(20p - p/2).
X2(t) = 4 sin(15 pt),
Let p1(t) and p2(t) be the powers of x1(t) & x2(t) respectively.
P1 (t) = A2/2 = 82/2 = 64/2 = 32.
P2 (t) = A2/2 = 42/2 = 16/2 = 8.
The average power P = P1+P2 = 32+8 = 40.
Let x1(t) = 8 cos(20p - p/2).
X2(t) = 4 sin(15 pt),
Let p1(t) and p2(t) be the powers of x1(t) & x2(t) respectively.
P1 (t) = A2/2 = 82/2 = 64/2 = 32.
P2 (t) = A2/2 = 42/2 = 16/2 = 8.
The average power P = P1+P2 = 32+8 = 40.
(2)
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