1. A wireless communication receiving apparatus, comprising: an antenna for receiving via first and second wireless communication channels a composite communication symbol that represents first and second communication symbols which correspond to respective results of first and second coding operations performed by a transmitter apparatus on a bit stream and an interleaved version of the bit stream, respectively; a probability generator coupled to said antenna and responsive to said composite communication symbol for generating, for each of said first and second communication symbols, a corresponding plurality of probabilities that the communication symbol has respective ones of a plurality of possible values of the communication symbol; first and second SISO decoders respectively corresponding to said first and second coding operations and coupled to said probability generator for respectively receiving therefrom the pluralities of probabilities corresponding to said first and second communication symbols; and said probability generator operable for generating at least one of said pluralities of probabilities also in response to SISO information received by said probability generator from at least one of said SISO decoders.