A wireless transmit/receive unit, WTRU, comprising: a means for receiving, in a single transmission time interval, TTI, a long term evolution, LTE, physical layer subframe over an orthogonal frequency division multiplexing, OFDM, signal, wherein the LTE physical layer subframe is divided into a plurality of time domain units and a plurality of frequency domain units, and wherein the LTE physical layer subframe includes a data part that comprises a first subset of the plurality of time domain and frequency domain units, and an associated control part that comprises a second subset of the plurality of time domain and frequency domain units, and reference signals interspersed on time domain and frequency domain units among the control part and the data part, wherein a plurality of transport blocks, TBs, are received simultaneously wherein the TBs were transmitted via a plurality of spatial streams in one transmission time interval, TTI, and wherein each TB of the plurality of TBs is assigned to a particular hybrid automatic repeat request, HARQ, process of a plurality of HARQ processes; wherein the control part includes a first time domain unit of the plurality of time domain units and carries control information associated with the plurality of TBs; wherein the control information includes for each TB of the plurality of TBs a modulation and coding scheme, MCS, and HARQ process information; wherein the HARQ process information for each TB of the plurality of TBs includes a redundancy version; wherein the data part includes other time domain units of the plurality of time domain units than the control part, and a cyclic redundancy check, CRC, for each TB sent using the data part; a means for processing the plurality of TBs using the control information so that multiple TBs may be processed per TTI; and further comprising a means for transmitting a HARQ feedback message comprising HARQ feedback for each of the TBs of the plurality of TBs concatenated into a single packet requesting retransmission of each TB of the plurality of TBs that was not successfully received and means for selecting a coding scheme for the HARQ feedback message based on the amount of feedback. a means for receiving, in a single transmission time interval, TTI, a long term evolution, LTE, physical layer subframe over an orthogonal frequency division multiplexing, OFDM, signal, wherein the LTE physical layer subframe is divided into a plurality of time domain units and a plurality of frequency domain units, and wherein the LTE physical layer subframe includes a data part that comprises a first subset of the plurality of time domain and frequency domain units, and an associated control part that comprises a second subset of the plurality of time domain and frequency domain units, and reference signals interspersed on time domain and frequency domain units among the control part and the data part, wherein a plurality of transport blocks, TBs, are received simultaneously wherein the TBs were transmitted via a plurality of spatial streams in one transmission time interval, TTI, and wherein each TB of the plurality of TBs is assigned to a particular hybrid automatic repeat request, HARQ, process of a plurality of HARQ processes; wherein the control part includes a first time domain unit of the plurality of time domain units and carries control information associated with the plurality of TBs; wherein the control information includes for each TB of the plurality of TBs a modulation and coding scheme, MCS, and HARQ process information; wherein the HARQ process information for each TB of the plurality of TBs includes a redundancy version; wherein the data part includes other time domain units of the plurality of time domain units than the control part, and a cyclic redundancy check, CRC, for each TB sent using the data part; a means for processing the plurality of TBs using the control information so that multiple TBs may be processed per TTI; and further comprising a means for transmitting a HARQ feedback message comprising HARQ feedback for each of the TBs of the plurality of TBs concatenated into a single packet requesting retransmission of each TB of the plurality of TBs that was not successfully received and means for selecting a coding scheme for the HARQ feedback message based on the amount of feedback.