Patent ID: 6115614
Filing Date: 2000-09-05
Classification: H04B,H04W

Abstract:
A system for averaging reception levels at which the pilot signals are received in a cellular mobile radio communication system comprising base stations that send pilot signals all the time and a mobile station having a device for use in determining a reception level of the transmitted pilot signal as a pilot signal reception level, said base station comprising:propagation environment parameter determining means for determining a propagation environment parameter; andmeans for transmitting the propagation environment parameter to said mobile station, andsaid mobile station comprising:reception means for receiving the propagation environment parameter;pilot signal reception level fluctuation rate detection means for detecting a fluctuation rate of the pilot signal reception level;propagation loss fluctuation bandwidth predicting means for predicting a fluctuation bandwidth for a propagation loss component included in the pilot signal reception level; andan averaging filter of which the pass band characteristic is allowed to change,said mobile station predicting, as a predicted fluctuation bandwidth, the fluctuation bandwidth for the propagation loss component included in the pilot signal reception level, based on the propagation environment parameter and the fluctuation rate of the pilot signal reception level received by said reception means, said mobile station changing the pass band characteristics of said averaging filter according to the predicted fluctuation bandwidth, said mobile station passing the pilot signal through the averaging filter with the determined pass band characteristics to acquire only the propagation loss component.