ELEC 241 Lab
Analysis
The picture of the system we are going to build should
look familiar.
It is simply a realization of the
fundamental model of communication
that we saw in the first week of class:
Figure 9.3
Since we will be using a wireless channel, we know from
Section 6.4
of the textbook that we will have to modulate our baseband
speech signal to a higher frequency.
Section 6.11
tells us how to do this using
amplitude modulation (AM):
where
is the carrier frequency and
is the
carrier amplitude.
It also tells us the best way to demodulate the signal
at the other end of the channel,
the AM coherent receiver:
Figure 9.4