| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress missing of information even in such a case that only partial input signals exceed a fixed bit length. <P>SOLUTION: A fast Fourier transformation apparatus (10) performs transformation processing for executing fast Fourier transformation and inverse fast Fourier transformation through a fixed point arithmetic operation of a fixed bit length. The fast Fourier transformation apparatus (10) includes partial data correction sections (11 and 12) in which, if a bit length exceeding signal which exceeds the fixed bit length for performing the fixed point arithmetic operation is included in input signals when performing the transformation processing, a bit length is corrected for the bit length exceeding signal included in the input signals so as to be settled within the fixed bit length but the bit length is not corrected for any other signal than the bit length exceeding signal included in the input signals. <P>COPYRIGHT: (C)2012,JPO&INPIT |
