Due to the complexity of modern communication systems and the environment in
which they are deployed, standard analytical techniques must be supplemented
by computer-aided techniques in the design and testing process. Properly developed
simulations are much like a hardware testbed in that they can be used to support
system development in the following areas:
to collect waveforms at various points in the system in order to
validate performance and to gain insight into system operation,
to perform parametric studies,
to test design alternatives (play “what if” games), and
to evaluate overall system performance.
A properly developed simulation requires the following:
models must be valid,
the simulation methodology must be correct and appropriate for the problem under study,
the simulation code must be validated, and
the overall simulation must be sanity checked.
The most important
and error-prone part of this process is model development. Models of hardware
can sometimes be based on the mathematical equation of the process implemented
by the hardware. However, in many circumstances the hardware model must be
developed from measurements of the input-output characteristics of the hardware
being measured. The measurements must be obtained over the ranges of voltage,
current, power, temperature, frequency, etc., that reflect the operating
environment of the hardware.
simulation methodologies are fundamental tools that are used in most research
efforts at MPRG. However, modeling and simulation are research activities in
their own right, and projects with both industry and government have been
granted to MPRG for the purpose of developing modeling and simulation
methodologies. In addition, in the important area of software radios the
boundary between the simulation of the radio and the hardware that implements
the radio is blurred since the simulation of the radio, when downloaded to the
appropriate chip sets, becomes the radio.