Low-height radio echo signal simulation method and system based on laboratory

The invention provides a low-altitude radio echo signal simulation method and system based on a laboratory. The method comprises the following steps: acquiring time consumed when the radio low-altitude echo signal simulation system generates an echo signal; acquiring beat signals according to the consumed time; and generating an echo signal according to the beat signal. The device can provide real-time radio echo signals with high precision, good performance and strong error correction capability for a frequency-modulated continuous wave radio altimeter, and has the characteristics of high reliability, high stability and the like, so that dynamic indexes of a frequency offset servo altimeter and a constant beat radio altimeter can be tested under a semi-physical simulation condition; and the rationality of the flight control parameters and the overall control performance are assessed. 本发明提供一种基于实验室的低高度无线电回波信号模拟方法和系统，该方法获取无线电低高度回波信号模拟系统生成回波信号时的耗时；根据所述耗时，获取差拍信号；根据差拍信号，生成回波信号。可以为调频连续波无线电高度表提供实时、精度高、性能好、纠错能力强的无线电回