Research and Implementation of the Modernized GPS Signal L2C and L5

Modern global positioning system (GPS) signals L2C and L5 have a new developmental prospect, although GPS was originally conceived for use by the military in their missions, it has become an important utility for a number of civil and commercial applications. New signals simulations provide effective help to the design of simulation as well as various simulation algorithms. This article discusses the structure of modern GPS new L2C and L5 civilian signals, analyses the principle and generation approach of the L2C ranging code and L5 two ranging codes in quadrature (I and Q channels), and then the modern GPS signals simulation was constructed based on Simulink. The result shows that the simulation platform is effective and reliable, and it is simple and intuitional which can provide a strong support for the engineering application.