CPC G01S 19/396 (2019.08) [G01S 19/02 (2013.01); G01S 19/23 (2013.01); G01S 19/48 (2013.01)] | 8 Claims |
1. An anti-spoofing satellite navigation and positioning method, applied to a chip, comprising the following steps:
activating a control decision-making unit to perform a first self-test to determine whether firmware needs to be updated; and
performing a second self-test by the control decision-making unit to determine whether a signal identification function is normal;
receiving a positioning satellite radio frequency (RF) signal by a satellite RF receiving module to obtain a received signal, and detecting whether a power strength of the received signal exceeds a preset threshold;
preprocessing the received signal by a satellite RF signal identification module, and intercepting an identifiable positioning satellite signal for identification to distinguish a real signal and a false signal; and
calculating the received signal to acquire real position and time information when the received signal is identified as the real signal; and
sending an alarm message when the received signal is identified as the false signal.
|