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We considered the range of PPP online services that solve the problem of high-precision coordinates and receiver time scale shift determination for the RINEX daily records. The comparative estimation of exact indicators of position determination for different geoids is given. The results contains the recommendations for use the online PPP services to solve the problem of time scales comparison.
The impact of the fitness functions: minimizing the RMS / maximum side lobe in the working area of the ACF signal is examined. Also the influence of such genetic algorithm parameters as the population size, the mutation rate, the type of crossover functions and other at the rate of convergence of the algorithm to solve the problem of the signal synthesis with a low level of side lobe is investigated...
The paper presents the search of ranging codes based on shortened Kasami and bent sequences. The criterion of minimum multiple access interference (MAI) level in wide range of Doppler shifts is applied.
The paper considers two wideband signal design approaches, namely the tabu search and the genetic algorithm, by the criteria of minimizing the sidelobe levels that is essential in the performance of radar, positioning and other radio electronic systems. Both algorithms are compared in the achieved minimum sidelobe levels as well as calculation time required.
The possibility of tabu search application for the signals design with a reduced side lobe level in a specified zone of the periodic autocorrelation function is considered. Associated difficulties of using tabu search algorithm and their potential solutions are discussed.
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