Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of transmitting a wireless signal from a wireless transmitter, comprising the steps of: receiving a data stream; dividing the data stream into a first data stream and a second data stream; encoding the first data stream in response to a first channel quality indication; encoding the second data stream separately from the first data stream in response to a second channel quality indication; converting a first part of the encoded first data stream to a first symbol; converting a second part of the encoded first data stream to a second symbol; multiplying the encoded first and second symbols by a linear basis matrix to produce first and second product symbols; and transmitting the product symbols from at least two transmit antennas of the wireless transmitter.
2. The method of claim 1 , comprising the steps of: converting a first part of the encoded second data stream to a third symbol; converting a second part of the encoded second data stream to a fourth symbol; multiplying the encoded third and fourth are basis matrix to produce third and fourth product symbols; and transmitting the third and fourth product symbols from the at least two transmit antennas.
3. The method of claim 1 wherein the linear basis matrix is unitary.
4. The method of claim 1 , wherein the linear basis matrix is non-unitary.
5. The method of claim 1 , wherein at least one of the encoded first and second data steams comprise orthogonal frequency division multiplex (OFDM) symbols.
6. The method of claim 1 , wherein the data stream comprises data for at least two different wireless receivers.
7. The method of claim 1 , wherein the data stream comprises data for a single wireless receiver.
8. A wireless transmitter, comprising: a first serial-to-parallel circuit arranged to convert a data stream into a first data stream and a second data stream; a first encoder circuit arranged to encode the first data stream at a first data rate; a second encoder circuit arranged to encode the second data stream at a second data rate greater than the first data rate; a first symbol mapper arranged to produce a first and a second symbol from the first data stream; a second symbol mapper arranged to produce a third and a fourth symbol from the second data stream; and a group circuit arranged to multiply the encoded first, second, third, and fourth symbols by a linear basis matrix to produce a plurality of product symbols.
9. The wireless transmitter of claim 8 , comprising applying the plurality of product symbols to a plurality of transmit antennas.
10. The wireless transmitter of claim 9 , wherein the data stream comprises data for at least two different wireless receivers.
11. The wireless transmitter of claim 9 , comprising more than four transmit antennas.
12. The wireless transmitter of claim 8 , wherein each of the first and second data rates is selected in response to a channel quality indication.
13. The wireless transmitter of claim 8 , comprising: a first interleaver circuit arranged to interleave the first data stream; and a second interleaver circuit arranged to interleave the second data stream.
14. The wireless transmitter of claim 8 , wherein the group circuit applies the plurality of product symbols to a plurality of transmit antennas.
15. The wireless transmitter of claim 8 , wherein the linear basis matrix is unitary.
16. The wireless transmitter of claim 8 , wherein the linear basis matrix is non-unitary.
17. The wireless transmitter of claim 8 , wherein the symbols comprise orthogonal frequency division multiplex (OFDM) symbols.
18. The wireless transmitter of claim 8 , wherein the data stream comprises data for a single wireless receiver.
19. A method of receiving a signal at a wireless receiver, comprising the steps of: receiving at the wireless receiver a plurality of symbols from a plurality of remote transmit antennas; detecting the plurality of symbols; receiving a plurality of pilot signals from the remote transmit antennas; computing an effective channel matrix in response to the received pilot signals; multiplying the plurality of symbols by the effective channel matrix to produce a plurality of product symbols; and decoding the plurality of product symbols.
20. The method of claim 19 , wherein the step of receiving a plurality of symbols comprises receiving a plurality of symbols at a plurality of receive antennas.
21. The method of claim 20 , wherein the plurality of receive antennas comprises at least four receive antennas.
22. The method of claim 20 , wherein the plurality of receive antennas comprises more than four receive antennas.
23. The method of claim 19 , wherein the step of detecting comprises Mean Minimum Square Error (MMSE) detection.
24. The method of claim 19 , comprising producing a channel quality indication.
25. The method of claim 19 , comprising the steps of: producing a channel rotation estimate; and transmitting the channel quality indication and the channel rotation, estimate to a remote transmitter.
26. The method of claim 19 , wherein the plurality of symbols comprises orthogonal frequency division multiplex (OFDM) symbols.
27. The method of claim 19 , wherein the plurality of symbols comprises data for at least two different users.
28. The method of claim 19 , wherein the plurality of symbols comprises data for a single user.
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February 23, 2016
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