Detection and termination of false GNSS measurements in presence of interference

• Main Authors: SCHERER, FRANK, K, RAMAN SUNDAR, JAFANIA JAHROMI ADEL, HIGGINS WILLIAM J
• Format: Patent
• Language: Chinese; English
• Published: 25.08.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

Systems and methods for verifying global navigation satellite system (GNSS) spacecraft (SV) signals are disclosed. Relative to another verified SV signal, an extremely weak frame synchronization (EWFS) verification process is performed on the current SV signal. Based on the peak EWFS correlation value of the current SV signal being equal to or greater than a first threshold, an indication of frame synchronization completion of the current SV signal is set after full frame synchronization occurs. The indication may be set early based on a peak EWFS correlation value of the current SV signal being greater than a second threshold, the second threshold being greater than the first threshold. Based on the peak EWFS correlation value of the current SV signal being less than a third threshold, tracking of the current SV signal may be terminated early, the third threshold being less than the first threshold. 公开了用于校验全球导航卫星系统(GNSS)空间飞行器(SV)信号的系统和方法。相对于另一个校验的SV信号，对当前SV信号运行极弱帧同步(EWFS)校验过程。基于当前SV信号的峰值EWFS相关值等于或大于第一阈值，在发生全