V.V. Dneprov - Post-graduate Student, Department of Radio Systems, «National Research University «MPEI» (Moscow) E-mail: vvdneprov@mail.ru I.V. Korogodin - Ph. D. (Eng.), Associate Professor, Department of Radio Systems, «National Research University «MPEI» (Moscow) E-mail: korogodin@srns.ru

One of important application of global navigation systems (GNSS) receivers is attitude determination. The task of attitude determination is often solved in two stages. Phase measurements and phase ambiguity resolution are made at first stage. The second stage is the calculation of the parameters characterizing the orientation of the antennas system relative to the reference coordinate system. Phase measurements are usually performed by phase locked loops (PLL) or difference phase locked loops (DPLL). One can improve tracking loop performance using integration with inertial measurement units. Paper describes integration of DPLL with 3 axis gyro measurements. Such integrated system can compensate user rotation dynamics. This results in tightening bandwidths of DPLLs and improving anti-jam capability of navigational receiver. From the other hand, such integration can be used to estimate and compensate gyro-s errors, i.e. axis - biases. The algorithm itself and computer simulation results are given in the paper. Computer simulation shows that integration can enhance anti-jam capability by 8−10 dB for various angular velocity of an object.

 

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