Digital Signal Processing Reference
In-Depth Information
8
DSP Hardw
are Design II
8.1
Overview of Practical DSP Applications
in Communication Engineering
The TMS320C6711 DSP Starter Kit (or 'C6711 DSK) provides system design
engineers with an easy-to-use, cost-effective way to take their high-perfor-
mance TMS320C6000 designs from concept to production. As was extensively
discussed in the previous chapter — and is also covered in
Appendix E
—
the
1
C6711 DSK is powerful enough to use for fast development of network-
ing, communications, imaging, and other applications.
The
1
C6711 DSK has the capability of real-time signal processing opera-
tions, the most important of which is
digital filtering
. Filtering is one of the
most widely used applications in communications engineering.
1
Some of the
practical applications of filtering are listed below.
•
Demodulation of AM and FM signals
: Low-pass filtering is used
to recover baseband audio or video signal from the modulated signal.
•
Stereo generation
: In stereo systems, the basic audio signal is sep-
arated into low frequency and high frequency components using
filter banks, amplified, and then synthesized to generate the stereo
signal.
•
Filtering of noise
: Communications signals such as audio and video
signals are corrupted by various sources of noise during propagation
through communication channels. Filters are very useful in signal
restoration and signal enhancement.
In this laboratory, students will design, simulate, and implement three
important filtering applications using the 'C6711 DSK. The laboratory will
cover a wide spectrum of software and hardware tools, including using
MATLAB to design filters, programming the 'C6711 DSK to implement the
filters, and finally, using signal sources and measuring equipment to test the
overall applications.
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