Transmitting method and a receiving method of a modulated data stream

A receiving method of a modulated data stream (MOD) for use in a radio communication system, the method comprising:

• Receiving said modulated data stream (MOD) over a channel (CH);
• Generating a demapped data stream (DD) on the basis of demapping said modulated data stream (MOD);
• Generating a first and a second deinterleaved data streams DID1, DID2) on the basis of deinterleaving said demapped data stream (DD);
• Decoding said first deinterleaved data stream (DID1);
• Generating an a priori information (APH) on the basis of mixing a part of the first decoded deinterleaved data stream (DIDId) with a mixing vector (Mvec), and
• Decoding said second deinterleaved data stream (DI D2) using said a priori information (APH).

A transmitting apparatus (TR) of a modulated data stream (MOD), the apparatus comprising:

• A mixer (MIX1) for generating a mixed data stream (MD) on the basis of mixing at least one part of a first data stream (HP) with a second data stream (LP);
• A first turbo-coder (T-COD1) for encoding said first data stream (HP);
• A second turbo-coder (T-COD2) for encoding said mixed data stream (MD);
• Two interleavers (π) for generating two interleaved data streams (ID) based on the first coded data stream (HPc) and on the mixed coded data stream (MDc);
• A mapper (MAP) for generating a modulated data stream (MD) on the basis of mapping said interleaved data streams (ID1, ID2);
• and
• A transmitter (TX) for transmitting said modulated data stream (MD) over a channel (CH).

A receiving apparatus (RV) of a modulated data stream (MOD) for use in a radio communication system, the apparatus comprising:

• A receiver (RX) for receiving said modulated data stream (MOD) over a channel (CH);
• A demapper (DMAP) for generating a demapped data stream (DD) on the basis of demapping said modulated data stream (MOD);
• Two deinterleavers (τf1) for generating a first and a second deinterleaved data streams (ID1, ID2) on the basis of deinterleaving said demapped data stream (DD);
• A first turbo-decoder (T-DCOD1) for decoding said first deinterleaved data stream (ID1):
• A mixer (MIX3) for generating an a priori information (APM) on the basis of mixing a part of the first decoded deinterleaved data stream (DIDId) with a mixing vector (Mvec), and
• A second turbo-decoder (T-DCOD2) for decoding said second deinterleaved data stream (ID2) using said a priori information (APH).