DATA TRANSMISSION APPARATUS AND DATA TRANSMISSION METHOD

摘要

In a base station (100), a TA control amount calculation unit (106) calculates a time alignment control amount according to a signal received from a communication terminal station (150). Next, a TA control amount rounding unit (107) rounds the time alignment control amount to obtain a time alignment control amount of a predetermined valid number of digits and a rounding error amount. A reception timing correction unit (109) corrects the reception timing detected by a reception timing detection unit (103) by using the aforementioned rounding error amount. A reception unit (104) obtains demodulation data from the reception signal at the reception timing after this correction.