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The most effective algorithm of the float solution determination using the Kalman filter in GPS/GLONASS systems has been considered. Special attention has been given to the problems of this algorithm implementation connected with the change of the visible satellite group. The methods of solving these problems have been offered, and the experimental estimation has been presented.
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Composing the gyro-free inertial navigation system (INS) on the basis of the distributed set of accelerometers has been considered. It has been shown that the proposed 12-sensors variant has more accurate characteristics of the navigation parameters calculation (coordinates and angle velocity).
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The long-term cold start issue after short losing of the GNSS signals in multi-antenna systems has been solved by adding the inertial navigation system (INS). The basic vector calculation error estimation based on INS has been obtained. The methods of choosing the parameters of INS MEMS, providing the basic vector determination with not exceeding the estimated error, have been presented.
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The effectiveness analysis of the combined GLONASS/GPS compared with the GPS system has been carried out. The analysis is based on real experimental data.
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The algorithms of self-coordinates using the cellular networks GSM/UMTS performed at the mobile device side based on the identifiers of the cellular base stations Cell ID have been considered. The algorithms effectiveness has been analyzed based on the real experimental data.
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