Radio Interference Calculator
Senior Project: 2001-2002
In the rapidly evolving world of wireless communications, the reallocation of
frequency bands to new services is often required. In some cases, government
agencies are required to move services to a new band or to share a band with
new services. When a large number of new users migrates to a band, a method to
allocate new frequency assignments in an optimum manner is needed to evaluate
feasibility, required spectrum, resulting interference, costs, etc.
The Institute for Telecommunication Sciences requested an automated program to
calculate optimal frequencies for new transmitter stations. Initially the
program will be applied to finding the best frequencies for use by differential
GPS (DGPS) transmitters across North America. Because the DGPS frequencies lie
in a band also used by aeronautical beacons, the program will account for
existing beacons and find optimal frequency assignments that minimize
interference for all users of the band.
The software determines a frequency to assign to a new transmitter placed into
an area of existing transmitters. It takes input about the new transmitter,
reads a database of existing transmitters, and uses that information to
determine the optimal frequency to assign to the new transmitter.
The project was developed using a combination of C and Fortran and runs in
both Windows and UNIX environments.
 Parameter Specification
Optimization Results
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