Reshetnyak O. Spread spectrum signals demodulation with the adaptive Kalman filter estimation of non-stationary radiochannels parameters

Research subject is spread spectrum signals demodulation process in the third generation mobile systems UMTS. Research objective is solving of the non-stationary radio channel parameters optimal estimation problem with low signal-to-noise ratio using adaptive Kalman filter and pilot-signal for spread spectrum signals demodulation. Research methods are math analysis for the selection of the optimum criterion of the radio channel parameters estimation and for the radio channel parameters estimation method development, computer simulation for the verification of the developed methods, algorithms and schemes. Research results are the method and the schemes of the non-stationary radio channel parameters estimation that basis on the adaptive Kalman filter and pilot-signal and performance of the demodulator with these schemes. Novelty is consists in the following: the methods of the channel parameters estimation with the pilot-signal are known but they are used for the estimation of the stationary radio channels parameters and they are non-efficient in the case of the non-stationary radio channels. The research results are used in educational process in the Odessa National Academy of Telecommunication by name A.S. Popov and were used for the science work "Development of the subjects documentation of the chair of TEC" № 0104U005916.