| 摘要 |
<p>The present invention relates to a transmission apparatus (400) and method for transmitting signals in a multi carrier transmission system comprising a modulator (410) that modulates each of multiple data streams onto frequency subcarriers of a respective frequency band within one of a group of one or more frequency channels, the frequency bands each occupying no more than a predetermined maximum bandwidth less than or equal to the channel width, a band information generator (420) that generates band information defining the frequency bands corresponding to all of the data streams carried within that frequency channel, said band information including a tuning frequency indicator indicating a tuning frequency and a tuning frequency type indicator indicating the type of tuning frequency indicated by said tuning frequency indicator, wherein said type is selected from a group comprising at least a first type indicating a tuning frequency of a frequency band and a second type indicating a center frequency of a frequency channel, and a transmitter (430) that transmits said data streams modulated onto frequency subcarriers and one or more instances of said band information at respective frequency positions within each frequency channel. The present invention further relates to a corresponding receiving apparatus and method.</p> |
