DEMAPPING APPARATUS AND METHOD FOR RECEPTION OF DATA IN A MULTI-CARRIER BROADCAST SYSTEM

摘要

The present invention relates to an apparatus and a corresponding method for demapping a demapping input data stream (Q') having a channel bandwidth re- ceived in a multi-carrier broadcast systeminto a demapping output data stream (Sy'). To enable an efficient demapping of a demapping input data stream (Q'), whose robustness and data rate have been individually been selected by the transmitter by selection of the MIMO mode and/or the pilot patter, said apparatus comprises a frame demapping means (152) for demapping said frames (F) comprising a payload portion(50) into said demapping output data stream (Sy'), wherein said frame demapping means (134) is adapted for the data blocks of said demapping output data stream (Sy') from the payload portion (50), wherein payload dataare mapped onto the payload portion(50)comprising a plurality of data symbols (52) carrying payload data of at least two mapping input data streams (S1, S2, ..., Sp), said payload portion (50) being segmented into data segments(51) each covering a bandwidth portion of said channel bandwidth. Further, a MIMO mode detection means (123a, 123b, 143) for detecting the MIMO mode of the data blocks per data segment (51) and/or per mapping input data stream (S1, S2, ..., Sp)and/or a pilot pattern detection means (123a, 123b, 143) for detecting the pilot pattern of the data blocks per data segment (51) and/or per mapping input data stream (S1, S2, ..., Sp)is provided.