IMPROVING THE ACCURACY OF EXPONENTIAL SMOOTHING IN SECONDARY INFORMATION PROCESSING IN MODERN INFORMATION LOCATION SYSTEMS
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Abstract
The quality of tracking location objects (LO) depends not only on their ability to perform complex maneuvering, but also on the influence of external conditions of the primary processing of location information (LI). These external conditions can be defined as the state of the atmosphere and the influence of the earth (sea) surface. The quality of secondary processing of LO, in particular, the stability of tracking depends on the accuracy of the current measurement of the radial velocity of the observation object (OO), which is largely determined by the influence of the external conditions of the primary processing means of LI (radar) performing its intended tasks. The subject of study in the article is the possibility of improving the quality of secondary processing of the LI, namely, the accuracy of tracking the LO by radial velocity. The aim is to study the possibilities of increasing the accuracy of exponential smoothing in the secondary processing of the LI by considering the correlated phase fluctuations of the signal at the stage of current measurement of its Doppler frequency. Objective: to consider the information on correlated phase fluctuations of radio pulses of the packet signal when tracking the LO by radial velocity. Methods used: maximum likelihood and Kalman filtering of trajectory parameters. The following results were obtained. The influence of correlated phase fluctuations of the received packet signal radio pulses on the decrease in the accuracy of the discrete tracking measurement of its Doppler frequency is estimated. The possibilities of increasing the accuracy of exponential smoothing in the steady-state filtering mode in the discrete tracking measurement of the radial velocity of an OO by considering the correlated phase fluctuations of the received packet signal radio pulses, which are described by a known correlation function, are determined. Recommendations for constructing a block diagram of a trajectory parameter filtering device for tracking measurement of the radial velocity of an OO with the implementation of an improved exponential smoothing procedure in it are given. Conclusions. Proposals are presented to improve the accuracy of exponential smoothing by considering information on the correlated phase fluctuations of the received radio pulses at the stage of current Doppler frequency measurement, which contributes to the efficiency of secondary processing of the LI in difficult conditions of performing the radar's intended tasks. A promising direction for further research may be to identify ways to improve the accuracy of joint tracking measurement of the range and radial velocity of the OO.
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References
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