Abstract:
The combined decoder re-uses input/output RAM of Turbo-code decoding means as alpha-RAM or beta-RAM for convolutional code decoding means. Further operational units (SM, LLR) are used for both Turbo-code and convolutional code. An effective harware folding scheme permits to calculate 256 states serially on 8 ACS units.
Abstract:
The actual transport format is ex ante unknown and belonging to a set of MF predetermined reference transport formats. The signal comprises a data block having an ex ante unknown number of bits corresponding to said ex ante unknown transport format, and a cyclic redundancy check (CRC) field containing a transmitted CRC word. The method comprises decoding said signal using a Maximum-a-Posteriori algorithm, said decoding step including decoding said signal considering respectively the MF possible reference formats and respectively delivering MF corresponding groups of soft output information, calculating from each group of soft output information a calculated CRC word and comparing said calculated CRC word with said transmitted CRC word, selecting all the groups for which said calculated CRC word is equal to said transmitted CRC word, and selecting the actual transport format of the encoded signal from at least one soft output information among the last ones of each selected group.