| 摘要 |
The present invention relates to an apparatus and a corresponding method for mapping payload data of mapping input data streams (S1, S2,..., Sn) onto a mapping output data stream (Q) having a channel bandwidth for transmission in a multi- carrier broadcast system. In an embodiment first and second frame forming means are provided, wherein the first frame forming means (14) are adapted for forming first frames (F1) having a first frame structure and wherein the second frame forming means (16) are provided for forming second frames (F2) having a second frame structure. Preferably, in a second frame structure the data blocks of a particular mapping input data stream are spread in time and frequency over various data symbols and various data segments of the second frames to provide a high robustness against disturbances. The payload portion (50) of the second frame is preferably segmented into various data segments enabling the use of a narrow-band receiver, even if both the first and second frames cover the same total channel bandwidth. |
