GNSS (Global Navigation Satellite System) navigation deception detection method and device

The embodiment of the invention provides a GNSS (Global Navigation Satellite System) navigation deception detection method and device, and relates to the technical field of GNSS navigation deception detection. The method comprises the steps that GNSS navigation deception signals are received, and the deception signals and real signals are similar in power and are the same in frequency and phase; obtaining a lead code, an instant code and a lag code obtained by processing the deception signal, and obtaining three signal output values of the lead code, the instant code and the lag code in an in-phase branch; obtaining a first detection quantity according to the total output value of the three signal output values; and comparing the first detection quantity with a preset threshold to obtain a comparison result, and outputting a detection result according to the comparison result. According to the method and the device, the SAIBO detection quantity is constructed by summing the three signal output values of the l