VHF voice and data communications via Equatorial Electrojet scattering: Channel characterization and application of a frequency diversity technique using Software Defined Radio technology

The Equatorial Electrojet (EEJ) is a horizontal electron current flowing along the magnetic Ecuador, confined to a thin layer located at 100 km altitude in the ionosphere. The EEJ can be used as a scattering media to establish radio communication links in the VHF band. The aim of this work is to study the characteristics of the EEJ as a communication channel and to improve the quality of voice and data communications using the frequency diversity technique. To perform these studies, we have developed a simulator for EEJ radio communications in order to test different modulation techniques. The results obtained from the simulations have been verified experimentally by establishing an EEJ radio link between two radio stations in the Peruvian territory. The simulation and experimental results of this work will be reported. In addition, a new radio communication system based on Software-Defined Radio technology is being developed at the Jicamarca Radio Observatory. This system will be used to provide communications to remote locations in Peru.