Research on Nonlinear Radar Speed and Distance Measurement Method Based on Costas Code

A nonlinear radar echo signal model based on costas frequency modulation signal was established. The multi order nonlinear effects of nonlinear radar were comprehensively considered. A nonlinear radar echo phase compensation method for costas encoded signals was proposed. The nonlinear radar velocity and distance measurement information of the second and third harmonic costas encoded signals were obtained, which has important value for signal processing and application of nonlinear radar systems.