Adaptive communication system design for HF/VHF multiple-mechanism propagation paths

The authors describe the nature of multiple-mechanism propagation paths (MMPPs) in the HF/low-VHF frequency range from 2 to 200 MHz. The design of systems to exploit such paths is then considered; channel encoding/decoding and real-time channel evaluation aspects are emphasized. Finally, the overall architectural framework for an MMPP radio system, currently under development, is presented.<<ETX>>