US 11,719,829 B2
Anti-spoofing satellite navigation and positioning method and chip
Chunjie Cao, Haikou (CN); Yang Sun, Haikou (CN); Fangjian Tao, Haikou (CN); Xin Zheng, Haikou (CN); and Xiuhua Wen, Haikou (CN)
Assigned to Hainan University, Haikou (CN)
Filed by Hainan University, Haikou (CN)
Filed on Sep. 28, 2021, as Appl. No. 17/449,091.
Claims priority of application No. 202011050377.X (CN), filed on Sep. 29, 2020.
Prior Publication US 2022/0099842 A1, Mar. 31, 2022
Int. Cl. G01S 19/02 (2010.01); G01S 19/03 (2010.01); G01S 19/39 (2010.01); G01S 19/23 (2010.01); G01S 19/48 (2010.01)
CPC G01S 19/396 (2019.08) [G01S 19/02 (2013.01); G01S 19/23 (2013.01); G01S 19/48 (2013.01)] 8 Claims
OG exemplary drawing
 
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.