A simulation testbed has been developed that can be used as a tool for the development, implementation, and testing/verification of algorithms for airborne telemetry applications. This testbed utilizes both SOQPSK and OFDM for its modulation waveforms and LDPC for the FEC codes. It also uses several sets of published telemetry channel sounding data as its channel models. Within the context of this simulation framework, we also present an adaptive algorithm that changes a test article's modulation type and FEC code rate based on the telemetry channel quality. This paper shows the details of the simulation framework and the adaptive rules for selecting the near-optimal transmission mode. It also presents an example of an adaptive scheme that has achieved approximately 30% to 340% good put performance improvement over the baseline schemes in simulation. Other potential uses of this testbed are also discussed.
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