Experimental verification of a generalized multivariate propagation model for ionospheric HF signals

New stochastic model for HF signal, received by the multisensor antenna array is presented for ionospheric propagation channel. The model introduces spatial fluctuations that are observed by the receiving antenna array, along with the Doppler frequency fluctuations. The new description generalizes the existing models and collapses into the perfectly validated scalar Watterson model for the single sensor reception. The proposed model is stimulated by practical attempts to improve the performance of HF radiosystems, and has been validated by the set of experimental transmissions from Coloumier (France), received by the antenna array in Odessa (Ukraine). Experimental results demonstrate a good compliance with the introduced model.