To make an OFDM (Orthogonal Frequency Division Multiplexing) signal demodulation data speed coincident with a TS output data speed.
A frequency error calculation circuit 15 detects a clock frequency error from the number of data within a term determined from the term of a reception OFDM signals and transmission control information, a frequency division ratio control circuit 12 controls a frequency division ratio of a clock frequency dividing circuit 13 based on the detected clock frequency error, and a fixed frequency clock CLK-A is frequency-divided by the clock frequency dividing circuit 13, so that a smoothing output clock is generated in which the OFDM signal demodulation data speed is coincident with a smoothing output speed, and the generated smoothing output clock is used as a TS output clock. Thus, a transport stream (TS) smoothing an OFDM demodulation output signal is output from a buffer memory 11.
COPYRIGHT: (C)2008,JPO&INPIT
MATSUMOTO HIDEYUKI
HORI SATORU
MOMOSHIRO TOSHIHISA
KAWAUCHI TOSHIKI
LACHLAN BRUCE MICHAEL
| JP2004214959A | 2004-07-29 | |||
| JP2005064741A | 2005-03-10 |
Eiichi Tamura
Seiji Iga