Wireless Personal Communication Project, Signal Processing
David Baietto, James Menne, Todd Ciccone, Keith George, and Timothy Hahn
Advisors: Drs. S. N. Prasad, B. D. Huggins, J.W. Sennott
The digital systems portion of the project has three key elements. The
first is the binary generator for the transmitter, consisting of a spread
spectrum generator for the "Gold Code" family, together with a synchronized
data bit generator. The second and third elements are the acquisition and
tracking processors at the receiver. Both of these are supported by a 12-channel
RF/IF and digital correlator board, originally designed for satellite navigation
applications. Software was modified to accomplish acquisition and tracking
of the down-converted 2.4 GHz signal. Attention was given to time and frequency
search window size, acquisition speed, and code, carrier, and bit sync.
Servo loops for maintaining code and carrier tracking coherency were evaluated
by simulation, implemented in software, and used to control the correlator
system across the PC bus.
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