Patent ID: 8630226

Claim:
A mobile station, comprising: a generating unit configured to generate a pilot channel comprising a CAZAC code cyclically shifted by a predetermined length; a mapping unit configured to map the pilot channel generated by the generating unit to multiple frequency components arranged at regular intervals in a given frequency band; and a transmitting unit configured to transmit a transmission signal including the pilot channel mapped by the mapping unit, wherein when a first frequency band used for the pilot channel included in the transmission signal to be transmitted by the transmitting unit is the same as a second frequency band used for a pilot channel included in a transmission signal of another mobile station, the generating unit uses, for the pilot channel included in the transmission signal to be transmitted by the transmitting unit, a same code length as and a different shift amount from those used for the pilot channel included in the transmission signal of the other mobile station; and when the first frequency band used for the pilot channel included in the transmission signal to be transmitted by the transmitting unit overlaps the second frequency band used for the pilot channel included in the transmission signal of the other mobile station and the first frequency band and the second frequency band have different bandwidths, the mapping unit maps the pilot channel to the multiple frequency components such that the pilot channel included in the transmission signal to be transmitted by the transmitting unit and the pilot channel included in the transmission signal of the other mobile station become orthogonal to each other on a frequency axis.