Research on Hardware-in-Loop Simulation Signal Platform for VHF Navigation

VHF (Very High Frequency) navigation system is an important part of the modern airplane, supplying the real-time navigation parameters. In the case of laboratory, in order to shorten the developing time and save the resources, we always use system model replacing the real system to accomplish the assignment. This paper, aiming at VHF navigation, will establish the mathematic model based on Software-Defined Radio theory and the hardware model based on FPGA technology, simulating the whole process of generating the signal from the ground station, receiving and transiting the message by the airplane equipment, and ultimately sending the parameter signal to the terminals.