An integrated GPS/INS navigation system can employ inertial velocity information to produce a more robust system. For a standalone GPS receiver, decreasing the receiver tracking loop bandwidth reduces the probability of losing lock in a jamming or interference environment if vehicle dynamics are low. However, reduced bandwidth increases tracking errors when dynamics are present. Beyond a certain limit, it causes a serious degradation in the dynamic tracking loop performance. Providing inertial velocity aiding to the receiver tracking loops is an effective and popular treatment to help resolve this problem. Performance of the GPS receiver tracking loops using inertial velocity aiding is investigated. Different types of tracking loops, from first to third order, are covered. Following the discussion of the system architecture and derivation of the related transfer functions for the tracking loops, both with and without aiding, the system performance, including transient response, steady-state error, and noise bandwidth is evaluated.
GPS receiver performance enhancement via inertial velocity aiding
The Journal of Navigation ; 54 , 1 ; 105-117
2001
13 Seiten, 12 Quellen
Article (Journal)
English
GPS Receiver Performance Enhancement via Inertial Velocity Aiding
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