Wideband statistics of signal levels and Doppler spread on an over-the-sea transhorizon link

The observations from a wideband experimental system designed to analyse an 11.647 GHz transhorizon channel subject to troposcatter and anomalous propagation conditions are presented. The statistics of the wideband signal levels and Doppler spread are given. The results reveal that as a result of anomalous propagation, this type of path can be successfully employed for communication purposes. Conversely, such a path can be a source of interference to adjacent channels for long periods of time. The Doppler spread analysis indicates fast channel variability during troposcatter conditions with values greater than 9 Hz.