| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the influence of noise, and also to improve the time followability of a transmission path characteristic. <P>SOLUTION: Infinite impulse response (IIR) filters 109, 110 calculate the movement average values of transmission path characteristics estimated by a current transmission path characteristic estimation part. A next transmission path characteristic estimation part estimates a next-time transmission path characteristic based on the outputs of the IIR filters 109, 110 and a coefficient stored by a coefficient storage part 114. The coefficient stored by the coefficient storage part 114 is the coefficient which is calculated based on a difference between the outputs of the movement average values of transmission path characteristics previously calculated by the IIR filters 109, 110 with different oblivion coefficients and also a transmission path characteristic estimated by a pilot complex division part 101. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
