Answer 2.11
Applying the ShannonHartley equation we obtain:
3500000 = 1400000.log
2
(
S
/
N
+ 1)
Thus, for error free transmission, the
S
/
N
ratio must
exceed
:
S
/
N
= 2
3.5 / 1.4
1 = 4.656 or 10log
10
(4.656) = 6.7 dB