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Positioning process and system thereof

  • US 6,311,129 B1
  • Filed: 04/06/1999
  • Issued: 10/30/2001
  • Est. Priority Date: 04/06/1998
  • Status: Expired due to Term
First Claim
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1. A positioning system for a vehicle, comprising:

  • a global positioning system (GPS) radio frequency (RF) unit for receiving global positioning system (GPS) radio frequency (RF) signals, amplifying said GPS RF signals and down converting said GPS RF signals into intermediate frequency (IF) signals;

    a GPS digital signal processing unit for sampling said IF signal and deriving GPS pseudorange, delta range, and carrier phase measurements;

    an IMU data sampling unit for collecting angular rate and acceleration measurements of said vehicle from an inertial measurement unit (IMU);

    a centralized navigation Kalman filter for receiving and processing said GPS pseudorange, delta range, and carrier phase measurements for said GPS and said angular rate and acceleration measurements from said IMU;

    at least an interface which is a serial signal interface, including synchronous communication interface and asynchronous communication interface, for realizing said data and control communication with other avionics systems, wherein said interface is connected with said centralized navigation Kalman filter to realize communication with said avionics systems; and

    a time synchronizer for providing said time signal and local reference signal to said avionics system devices.

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