Chapter11 Pulse Modulation

Example 11.3.1,Pg.no.392

In [1]:
import math
SNR=40.0
#a) Determination of no . of bits /code
n=(SNR -(10*math.log10(3))-(-10))/(20*math.log10(2))
n=round(n,3)
print 'The no . of bits per code word is',n
print 'Rounded off to 8'

The no . of bits per code word is 7.512
Rounded off to 8

Example 11.3.2,Pg.no.393

In [2]:
import math
q=1.0
W=4*10**3
n=8.0
#a) Determination of Tx Bandwidth
B=(1+q)*W*n
print 'a)The transmission BW is',B,'Hz'
#b) Determination of quantization S/N ratio
SN_dB=6*n
print 'b)The quantization S/N ration is',SN_dB

a)The transmission BW is 64000.0 Hz
b)The quantization S/N ration is 48.0