Patent ID: 8526997

Claim:
A frequency control device comprising: a first detecting circuit to detect each of frequency deviations generated from each of signals transmitted from each of mobile stations respectively; a second detecting circuit to acquire classification information about at least one of location, moving speed and moving direction of each of the mobile stations; a classifying circuit to classify each of the mobile stations into groups based on the classification information; a first calculating circuit to calculate each of representative frequency deviations for each of the groups, respectively, each of the representative frequency deviations being calculated statistically based on the frequency deviations of the mobile stations belonging to each of the groups, respectively; and, a compensation circuit to multiply each of the signals by each of compensation signals that are generated based on the representative frequency deviations, wherein the second detecting circuit acquires the frequency deviations generated from the signals, wherein the classifying circuit detects a peak frequency corresponding to a peak concentration of frequency deviations and classifies each of mobile stations corresponding to a reception signal having a frequency deviation included in a specified range as a first mobile station based on the peak frequency, where the mobile stations are considered to be moving with a same moving speed within the specified range, and wherein when the peak frequency is at least a specified threshold value determined in response to a fact that corresponding mobile stations are moving with at least a specified speed, the classifying circuit classifies each of mobile stations corresponding to a reception signal having a frequency deviation included in the specified range as the first mobile station based on the peak frequency.