Question

Determine (a) the peak frequency deviation, (b) minimum bandwidth, and (c) baud for a binary FSK signal with a mark frequency of 38 kHz, a space frequency of 40 kHz, and an input bit rate of 4 kbps.

Answer 1

a)

$2\Delta\>f=|fm-f_s|$

$\Delta\>f=\frac{(40-38)}{2}=1kHz$

b)

$B_{min}=2(\Delta\>f+f_b)$

$=2(1+4)$

$=10kHz$

c)

Baud for a binary FSK $=\frac{f_b}{N}$ where $N=1$

$=\frac{4000}{1}=4000$