Dynamic DC offset canceling apparatus and dynamic DC offset canceling method

摘要

A dynamic DC offset canceling apparatus and a dynamic DC offset canceling method that make it possible to detect and cancel dynamic DC offset which may be produced in the middle of a burst and that require a relatively small amount of processing. The dynamic DC offset canceling apparatus includes: section (104) for detecting dynamic DC offset in the longest overlapping part sequences that detects dynamic DC offset in longest overlapping part sequences from the differences between the sampling values of a first longest overlapping part sequence and the sampling values of a second longest overlapping part sequence, the first longest overlapping part sequence and the second longest overlapping part sequence being overlapping part sequences in a training sequence of the received signal; section (105) for detecting dynamic DC offset outside the longest overlapping part sequences that detects dynamic DC offset outside the longest overlapping part sequences from the difference between an average value of sampling values of a received signal which exists in a burst before the first longest overlapping part sequence, and an average value of sampling values of a received signal which exists in a burst after the second longest overlapping part sequence; and a DC offset canceling section (106) that adaptively subtracts a DC offset value from the received signal based on these results.