Patent ID: 8588171

Claim:
A radio communication apparatus comprising: an arrangement section that arranges a first unicast-pilot sequence that is specific to one of a plurality of sectors or to one of a plurality of cells, a second unicast-pilot sequence that is specific to another of the plurality of sectors or to another of the plurality of cells, and a multicast-pilot sequence that is common between the plurality of sectors or between the plurality of cells, to positions in a frequency domain and a time domain, each of the first unicast-pilot sequence, the second unicast-pilot sequence and the multicast-pilot sequence being comprised of a plurality of pilots; and a transmission section that transmits the arranged first unicast-pilot sequence, the arranged second unicast-pilot sequence and the arranged multicast-pilot sequence, wherein, in one sub-frame, the arrangement section arranges a first pilot in the first unicast-pilot sequence and a second pilot in the second unicast-pilot sequence to a same frequency, the first pilot and the second pilot having a same value, and arranges the multicast-pilot sequence to frequencies other than the same frequency, to which the first pilot in the first unicast-pilot sequence and the second pilot in the second unicast-pilot sequence are arranged.