HARQ in spatial multiplexing MIMO system

A user equipment (UE) configured to receive a dual stream transmission in a system employing Hybrid Automatic Repeat Request retransmission, the UE comprising:

• a receiver;
• and
• processing circuitry operatively connected to the receiver and configured to determine which of a plurality of sub-processes is transmitted on which of a plurality of streams based on a sub-process address and a HARQ process identifier.

A method for transmitting a dual stream transmission in a system employing Hybrid Automatic Repeat Request (HARQ) retransmission, the method comprising:

• transmitting a plurality of transport blocks on corresponding streams, wherein each transport block has an associated sub-process, and wherein at least two of the associated sub-processes belong to a same paired process identifier.

A NodeB configured to transmit a dual stream transmission in a system employing Hybrid Automatic Repeat Request (HARQ) retransmission, the NodeB comprising:

• a processing circuit;
• and
• a transmitter operatively connected to the processing circuit and configured to transmit a plurality of transport blocks on corresponding streams, wherein each transport block has an associated sub-process, and wherein at least two of the associated sub-processes belong to a same paired process identifier.