Patent ID: 9622099
Date: 2017-04-11
CPC Classifications: H04B,H04L,H04W

Claim:
1. A base station apparatus comprising: a receiving unit that receives a transmitted signal which has been transmitted from a wireless communication terminal device and which includes a plurality of symbols arranged in a time direction; a frequency offset estimating unit that estimates a frequency offset based on a first signal which is mapped to a first symbol placed at a predetermined position in the transmitted signal received with the receiving unit and which is for measuring quality, and a second signal which is mapped to a second symbol placed at a position different from the first symbol in the transmitted signal and which is for demodulation, the second signal being transmitted in a sub-frame and frequency band that are identical to a sub-frame and frequency band of the first signal; and a transmission instructing unit that gives the wireless communication terminal device an instruction to transmit the second signal in the sub-frame and frequency band that are identical to the sub-frame and frequency band of the first signal.