System and method for uplink multiple input multiple output transmission
Methods and apparatuses are provided for uplink MIMO transmissions in a wireless communication system. In particular, a primary stream ( 610 ) may be utilized to carry a primary data channel E-DPDCH ( 624 ), and a secondary stream ( 612 ) may be utilized to carry a secondary data channel S-E-DPDCH ( 620 ). Further, the primary stream ( 610 ) may be precoded utilizing a primary precoding vector, and the secondary stream ( 612 ) may be precoded utilizing a secondary precoding vector, with coefficients orthogonal to those of the primary precoding vector. The primary stream may include an enhanced control channel E-DPCCH ( 614 ) adapted to carry control information associated with both the primary data channel E-DPDCH ( 624 ) and the secondary data channel S-E-DPDCH ( 620 ).
1. A method of wireless communication, comprising:
applying a first precoding vector to a primary data channel ( 624 );
applying a second precoding vector, orthogonal to the first precoding vector, to a secondary data channel ( 620 );
applying the first precoding vector to a primary control channel ( 614 ) configured to carry first control information associated with the primary data channel ( 624 );
applying the first precoding vector to a secondary control channel ( 616 A) configured to carry second control information associated with the secondary data channel ( 620 );
channel coding the first control information associated with the primary data channel ( 624 );
channel coding the second control information associated with the secondary data channel ( 620 ) independently of the channel coding of the first control information;
transmitting the primary data channel ( 624 ), the primary control channel ( 614 ), and the secondary control channel ( 616 A) utilizing a first virtual antenna ( 610 ); and
transmitting the secondary data channel ( 620 ) utilizing a second virtual antenna ( 612 )
wherein the second virtual antenna is different from the first virtual antenna.
2. The method of claim 1 , wherein the channel coding the first control information comprises encoding the primary control channel ( 614 ) independently of an encoding of any other channel.
3. The method of claim 2 , wherein the encoding of the primary control channel ( 614 ) comprises utilizing a spreading factor of 256.
4. The method of claim 2 , wherein the encoding of the primary control channel ( 614 ) comprises utilizing a spreading factor of 128.
5. The method of claim 1 , wherein the transmitting of the first virtual antenna and the transmitting of the second virtual antenna utilize the same carrier.
6. The method of claim 1 , further comprising:
mapping the first virtual antenna ( 610 ) and the second virtual antenna ( 612 ) to a first physical antenna ( 606 ) and a second physical antenna ( 608 ); and
transmitting a multiple input multiple output (MIMO) transmission over the first physical antenna ( 606 ) and the second physical antenna ( 608 ).
7. A computer program product, comprising:
a non-transitory computer-readable medium ( 2006 ) comprising instructions for causing a computer to:
apply a first precoding vector to a primary data channel ( 624 );
apply a second precoding vector, orthogonal to the first precoding vector, to a secondary data channel ( 620 );
apply the first precoding vector to a primary control channel ( 614 ) configured to carry first control information associated with the primary data channel ( 624 );
apply the first precoding vector to a secondary control channel ( 616 A) configured to carry second control information associated with the secondary data channel ( 620 );
channel code the first control information associated with the primary data channel ( 624 );
channel code the second control information associated with the secondary data channel ( 620 ) independently of the channel coding of the first control information;
transmit the primary data channel ( 624 ), the primary control channel ( 614 ), and the secondary control channel ( 616 A) utilizing a first virtual antenna ( 610 ); and
transmit the secondary data channel ( 620 ) utilizing a second virtual antenna ( 612 ) wherein the second virtual antenna is different from the first virtual antenna.
8. The computer program product of claim 7 , wherein the computer readable medium ( 2006 ) comprising instructions for causing a computer to channel code the first control information further comprises instructions for causing a computer to: encode the primary control channel ( 614 ) independently of an encoding of any other channel.
9. The computer program product of claim 8 , wherein the instructions for causing a computer to encode the primary control channel ( 614 ) are configured to utilize a spreading factor of 256.
10. The computer program product of claim 8 , wherein the instructions for causing a computer to encode the primary control channel ( 614 ) are configured to utilize a spreading factor of 128.
11. The computer program product of claim 7 , wherein the instructions for causing a computer to transmit the first virtual antenna and the instructions for causing a computer to transmit the second virtual antenna are each configured to utilize the same carrier.
12. The computer program product of claim 7 , wherein the computer-readable medium ( 2006 ) further comprises instructions for causing a computer to:
map the first virtual antenna ( 610 ) and the second virtual antenna ( 612 ) to a first physical antenna ( 606 ) and a second physical antenna ( 608 ); and
transmit a multiple output (MIMO) transmission over the first physical antenna ( 606 ) and the second physical antenna ( 608 ).
13. An apparatus for wireless communication, comprising:
a transmitter ( 2156 ) for transmitting a primary virtual antenna ( 610 ) and a secondary virtual antenna ( 612 );
at least one processor ( 2190 ) for controlling the transmitter; and
a memory ( 2192 ) coupled to the at least one processor,
wherein the at least one processor is configured to:
apply a first precoding vector to a primary data channel ( 624 );
apply a second precoding vector , orthogonal to the first precoding vector, to a secondary data channel ( 620 );
apply the first precoding vector to a primary control channel ( 614 ) configured to carry first control information associated with the primary data channel ( 624 );
apply the first precoding vector to a secondary control channel ( 616 A) configured to carry second control information associated with the secondary data channel ( 620 );
channel code the first control information associated with the primary data channel ( 624 );
channel code the second control information associated with the secondary data channel ( 620 ) independently of the channel coding of the first control information;
transmit the primary data channel ( 624 ), the primary control channel ( 614 ), and the secondary control channel ( 616 A) utilizing the first virtual antenna ( 610 ); and
transmit the secondary data channel ( 620 ) utilizing the secondary virtual antenna ( 612 ) wherein the second virtual antenna is different from the first virtual antenna.
14. The apparatus of claim 13 , wherein the channel coding the first control information comprises encoding the primary control channel ( 614 ) independently of an encoding of any other channel.
15. The apparatus of claim 14 , wherein the encoding of the primary control channel ( 614 ) comprises utilizing a spreading factor of 256.
16. The apparatus of claim 14 , wherein the encoding of the primary control channel ( 614 ) comprises utilizing a spreading factor of 128.
17. The apparatus of claim 13 , wherein the transmitting of the first virtual antenna and the transmitting of the second virtual antenna utilize the same carrier.
18. The apparatus of claim 13 , wherein the at least one processor is further configured to:
map the first virtual antenna ( 610 ) and the second virtual antenna ( 612 ) to a first physical antenna ( 606 ) and a second physical antenna ( 608 ); and
transmit a multiple output (MIMO) transmission over the first physical antenna ( 606 ) and the second physical antenna ( 608 ).