| 摘要 |
<p>A demodulation method and apparatus applicable to, for example digital broadcast signals modulated in accordance with orthogonal frequency division multiplexing (OFDM), is provided with a means for maintaining synchronization of carrier frequency correction control of the OFDM signals in a stable manner. A holding circuit (14) verifies whether or not a wide range fc/Common Phase Error (CPE) calculating circuit (10) is making an erroneous detection operation. The holding circuit performs the verification based on the information indicating the demodulation reliability, such as the result of a cumulative addition of Carrier Phase (CP) values, supplied from the wide range fc error/CPE calculating circuit (10), or the transmission control signal detection information, supplied from the transmission control information demodulating communication (17). If the wide range fc error CPE calculating circuit (10) is making an erroneous detection operation, the holding circuit (14) outputs the wide range fc error output in the previous symbol, without updating the information on the wide range fc error.</p> |
