A wireless communication apparatus is provided that is capable of
achieving both the suppression of interference between base stations and
the capability to track mobile stations that are moving at a high speed.
A moving speed estimating unit estimates the moving speed of each mobile
station based on reception signals. A directivity determining unit
determines reception antenna directivity for each mobile station based on
the reception signals and the estimated moving speeds. A signal
separating unit separates the reception signals into signal components
that have been transmitted from respective mobile stations, based on the
directivities. A signal recovering unit recovers transmission signals
from respective mobile stations based on the respective signal
components. A resource assigning unit determines radio resource
assignments of transmission signals to the respective mobile stations
based on a service quality signal and the estimated moving speed. A
transmission signal generating unit generates transmission signals based
on transmission information, the directivities, and the resource
assignments. A transmission signal multiplexes the transmission signals,
using the resource assignment signals, and outputs the multiplexed
transmission signal.