Abstract: Mobile radio systems are known in which base stations receive radio signals from a mobile station in parallel over different radio paths and forward the user data contained in the radio signals as data blocks to a central station. Transmission is in the form of data frames. In the receiver of the central station, erroneous data blocks are replaced with data blocks received correctly over another radio path. An erroneous data block is detected by means of an entry in an associated check field. To increase the reading of the check fields and access to the data blocks, a newly structured data frame is proposed. The data blocks are arranged immediately side by side, with each data block containing a number of bits divisible by 8 and all check fields are written into a check block provided for this purpose. This byte-oriented structure permits faster access to individual data blocks.