WIRELESS BASE STATION DEVICE, METHOD FOR DETECTING FREQUENCY DEVIATION, AND MOBILE COMMUNICATION SYSTEM

摘要

A wireless base station device has a path detection means which detects a preamble signal sent from a terminal to determine back-diffusion timing, a back-diffusion means to perform back-diffusion of a message signal sent from the terminal using the back-diffusion timing notified by the path detection means, and a calculation means to calculate frequency deviation of the back-diffused message signal from a pilot signal of the back-diffused message signal. The path detection means has an initial value information detection means which detects frequency deviation of the preamble signal in detecting the preamble signal to provide the detected frequency deviation to the calculation means as initial value information, while the calculation means has an initial value information addition means to use the initial value information for calculation of frequency deviation of the message signal.