Troposcatter array signal detection based on frequency and spatial fading correlation
Troposcatter propagation mechanism is valuable for beyond-line-of-sight surveillance. However, channel fading caused by multipath scattering limits the sensing performance of the existing equipment. Based on the troposcatter multipath channel fading model on frequency and spatial domain, a modified covariance-based detector is proposed. The captured array signals are first maximal ratio combined in frequency domain and then weighted in spatial domain before accumulation. The performance of the proposed detector is derived theoretically and verified through simulations, showing significant improvement in the troposcatter scenario.
