Patent ID: 8594117

Claim:
A base station in a mobile communications system which uses a single-carrier technique for uplink, comprising: a classifying unit which classifies, for each of multiple user apparatuses according to a path loss between the respective user apparatus and the base station, the multiple user apparatuses into two or more groups; and a scheduler which plans allocating of uplink resources to the multiple user apparatuses, wherein an uplink signal corresponding to each of the multiple user apparatuses includes frequency components, the frequency components arranged uniformly, wherein, in each of group bands to which the corresponding user apparatus belongs, the frequency components of the uplink signal of the corresponding user apparatus are multiplexed using distributed frequency division multiplexing such that two types of pilot channels are made mutually orthogonal on a frequency axis, wherein the two types of pilot channels comprise a pilot channel for channel state measurement for measuring a channel state and a pilot channel for channel compensation for conducting channel compensation, wherein the scheduler plans the resource allocating such that the multiple user apparatuses belonging to different groups utilize different group bands or different time slots, and wherein the group bands are specified by dividing a system band into groups.