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 a first data stream including an E-DCH dedicated physical data channel (E-DPDCH) and a first dedicated physical control channel (DPCCH);
generating a second data stream including a second DPCCH;
determining pre-coding weights for closed loop transmit diversity;
multiplying the pre-coding weights to the first data stream and the second data stream to generate a plurality of output streams; and
transmitting the output streams via a plurality of antennas, wherein the first DPCCH and the second DPCCH carry a same pilot sequence and are transmitted using different channelization codes.
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 data 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 a first data stream including an E-DCH dedicated physical data channel (E-DPDCH) and a first dedicated physical control channel (DPCCH), and generate a second data stream including a second DPCCH;
a weight generating block configured to generate pre-coding weights for closed loop transmit diversity;
a pre-coding block configured to multiply the pre-coding weights to the first data stream and the second data stream to generate a plurality of output streams; and
a plurality of antennas for transmitting the output streams, wherein the first DPCCH and the second DPCCH carry a same pilot sequence and are transmitted using different channelization codes.
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 data channel (DPDCH).
6. The WTRU of claim 4 wherein a pre-coding weight matrix of the pre-coding weights is diagonal.