Method and apparatus for multi-antenna transmission in uplink
Method and apparatus for uplink transmission using multiple antennas are disclosed. A wireless transmit/receive unit (WTRU) performs space time transmit diversity (STTD) encoding on an input stream of a physical channel configured for STTD. Each physical channel may be mapped to either an in-phase (I) branch or a quadrature-phase (Q) branch. The WTRU may perform the STTD encoding either in a binary domain or in a complex domain. Additionally, the WTRU may perform pre-coding on at least one physical channel including the E-DPDCH with the pre-coding weights, and transmitting the pre-coded output streams via a plurality of antennas. The pre-coding may be performed either after or before spreading operation.
1. A method implemented in a wireless transmit/receive unit (WTRU) for uplink transmission using multiple antennas, the method comprising:
generating at least one enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH) data stream;
performing physical layer processing on a binary sequence of each of a plurality of physical channels including an E-DPDCH, a first dedicated physical control channel (DPCCH) and a second DPCCH to generate a first data stream and a second data stream, the first data stream including the E-DPDCH and the first DPCCH and the second data stream including the second DPCCH, each physical channel being mapped to either an in-phase (I) branch or a quadrature-phase (Q) branch;
determining pre-coding weights;
performing pre-coding on the first data stream and the second data stream by multiplying the pre-coding weights to the first data stream and the second data stream, wherein one output stream is generated per antenna; and
transmitting the output streams via a plurality of antennas, wherein the first and second DPCCHs carry a same pilot sequence and are transmitted using different channelization codes, and either multiple E-DPDCH data streams are transmitted using multiple-input multiple-output (MIMO) or a single E-DPDCH data stream is transmitted using a closed loop transmit diversity.
2. The method of claim 1 wherein the first data stream includes at least one of an E-DCH dedicated physical control channel (E-DPCCH), a high speed dedicated physical control channel (HS-DPCCH), or a dedicated physical channel (DPDCH).
3. The method of claim 1 wherein a pre-coding weight matrix of the pre-coding weights is diagonal.
4. A wireless transmit/receive unit (WTRU) for uplink transmission using multiple antennas, the WTRU comprising:
a physical layer processing block configured to generate at least one enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH) data stream, and perform physical layer processing on a binary sequence of each of a plurality of physical channels including an E-DPDCH, a first dedicated physical control channel (DPCCH) and a second DPCCH to generate a first data stream and a second data stream, the first data stream including the E-DPDCH and the first DPCCH and the second data stream including the second DPCCH, each physical channel being mapped to either an in-phase (I) branch or a quadrature-phase (Q) branch;
a weight generating block configured to determine pre-coding weights;
a pre-coding block configured to perform pre-coding on the first data stream and the second data stream by multiplying the pre-coding weights to the first data stream and the second data stream, wherein one output stream is generated per antenna; and
a plurality of antennas for transmitting the output streams, wherein the first DPCCH and the second DPCCH carrying a same pilot sequence are transmitted using different channelization codes, and either multiple E-DPDCH data streams are transmitted using multiple-input multiple-output (MIMO) or a single E-DPDCH data stream is transmitted using a closed loop transmit diversity depending on E-DPDCH configuration.
5. The WTRU of claim 4 wherein the first data stream includes at least one of an E-DCH dedicated physical control channel (E-DPCCH), a high speed dedicated physical control channel (HS-DPCCH), or a dedicated physical channel (DPDCH).
6. The WTRU of claim 4 wherein a pre-coding weight matrix of the pre-coding weights is diagonal.