Modeling of Control and Signal Processing of MLS Simulation System

According to the technology system and navigation principle of the microwave landing system (MLS), and according to the electromagnetic (EM) similitude theory, the scale model of the environment of an airport equipped with MLS was set up to simulate the real propagation situation of the navigation signal transmitted by the MLS by the propagation of the laser in the scale model of the airport. The hardware-in-the-loop simulation system of flight checking was established based on scale model. The whole simulation system used the rapid prototype methodology-xPC target of MATLAB. The control function of the ground equipment and the signal process function of the airborne receiver were modeled with Simulink. The models of lock strobe, angle decoder were built. The given time interval and the simulation results were compared. The comparison results demonstrated the model was credible.