Siemens Aktiengesellschaft

Volker Franz

Dieter Emmer

In a process for transmitting data in a digital transmission system with a packet-switched service, an ARQ protocol and channel coding are used for minimizing errors with coders and decoders that supply &ldquo;soft&rdquo; information. When a data frame is transmitted again within the ARQ protocol, the information obtained by means of the channel decoder and ARQ protocol, that is, the &ldquo;soft&rdquo; information, is processed according to the coded bits together with the data frames transmitted again n&plus;1 to N in data frame n (n&equals; . . . N and n&equals;number of data frames transmitted within the ARQ protocol). This process makes it possible to process the information obtained a priori during decoding of the data frame n&plus;1 together with one or several data frames,to n. The device for implementing the process comprises an interleaver configured between the output of the decoder and the input of the equalizer, and a controller that directs the a priori information at the output of the coder to the equalizer via the interleaver when the data frame is rejected.

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Puchheim, Germany

Volker Franz