Data transmission in wireless communication system

1. A method for transmitting a data stream in a wireless communication system, comprising:

converting the data stream to a symbol set;

selecting a first plurality of symbols from the symbol set, wherein the first plurality of symbols includes at least a first symbol, a second symbol, a third symbol, and a fourth symbol, wherein any of the symbols includes a first part and a second part;

generating a second plurality of symbols having at least a fifth symbol and a sixth symbol, wherein the fifth symbol includes the first part of the first symbol and the second part of the second symbol and the sixth symbol includes the first part of the third symbol and the second part of the fourth symbol;

weighting the sixth symbol to form a first weighted symbol; and

transmitting in a first time slot the fifth symbol with a first antenna and the first weighted symbol with a second antenna.

2. The method of claim 1 , further comprising:

generating a seventh symbol and an eighth symbol, wherein the seventh symbol includes the first part of the second symbol and the second part of the first symbol and the eighth symbol includes the first part of the fourth symbol and the second part of the third symbol;

weighting the eighth symbol to form a second weighted symbol; and

transmitting in a second time slot the second weighted symbol with the first antenna and the seventh symbol with the second antenna.

3. The method of claim 1 , wherein the first part of each symbol of the first plurality of symbols is different from each other.

4. The method of claim 1 , wherein the second part of each symbol of the first plurality of symbols is different from each other.

5. The method of claim 1 , wherein the first part of the first symbol is the same as the first part of the second, the third, or the fourth symbol.

6. The method of claim 1 , wherein the second part of the first symbol is the same as the second part of the second, the third, or the fourth symbol.

7. The method of claim 1 , wherein a weight applied in the weighting step is e jθ , wherein θ is in a range from zero to around π/2.

8. The method of claim 1 , wherein the magnitude of the first part of a symbol is an in-phase component of the symbol and the magnitude of the second part of the symbol is a quadrature-phase component of the symbol.

9. A wireless communication system, comprising:

a transmitter having a first transmit antenna and a second transmit antenna configured to

convert a data stream to a symbol set;

select a first plurality of symbols from the symbol set, wherein the first plurality of symbols includes at least a first symbol, a second symbol, a third symbol, and a fourth symbol, wherein any of the symbols includes a first part and a second part;

generate a second plurality of symbols having at least a fifth symbol and a sixth symbol, wherein the fifth symbol includes the first part of the first symbol and the second part of the second symbol and the sixth symbol includes the first part of the third symbol and the second part of the fourth symbol;

weight the sixth symbol to form a first weighted symbol; and

transmit in a first time slot the fifth symbol with the first transmit antenna and the first weighted symbol with the second transmit antenna.

10. The wireless communication system of claim 9 , wherein the wireless communication system is a multiple input and multiple output (MIMO) system.

11. The wireless communication system of claim 10 , wherein the MIMO system comprises two receive antennas at a receiver.

12. The wireless communication system of claim 9 , wherein the transmitter is further configured to

generate a seventh symbol and an eighth symbol, wherein the seventh symbol includes the first part of the second symbol and the second part of the first symbol and the eighth symbol includes the first part of the fourth symbol and the second part of the third symbol;

weight the eighth symbol to form a second weighted symbol; and

transmit in a second time slot the second weighted symbol with the first transmit antenna and the seventh symbol with the second transmit antenna.

13. The wireless communication system of claim 12 , wherein a weight applied to the eighth symbol is e jθ , wherein θ is in a range from zero to around π/2.

14. The wireless communication system of claim 9 , wherein the magnitude of the first part of a symbol is an in-phase component of the symbol and the magnitude of the second part of the symbol is a quadrature-phase component of the symbol.

15. A computing device, comprising:

a memory; and

a processor configured to

convert a data stream to a symbol set;

select a first plurality of symbols from the symbol set, wherein the first plurality of symbols includes at least a first symbol, a second symbol, a third symbol, and a fourth symbol, wherein any of the symbols includes a first part and a second part;

generate a second plurality of symbols having at least a fifth symbol and a sixth symbol, wherein the fifth symbol includes the first part of the first symbol and the second part of the second symbol and the sixth symbol includes the first part of the third symbol and the second part of the fourth symbol;

weight the sixth symbol to form a first weighted symbol; and

transmit in a first time slot the fifth symbol with a first antenna and the first weighted symbol with a second antenna.

16. The computing device of claim 15 , wherein the processor is further configured to

generate a seventh symbol and an eighth symbol, wherein the seventh symbol includes the first part of the second symbol and the second part of the first symbol and the eighth symbol includes the first part of the fourth symbol and the second part of the third symbol;

weight the eighth symbol to form a second weighted symbol; and

transmit in a second time slot the second weighted symbol with the first antenna and the seventh symbol with the second antenna.

17. The computing device of claim 16 , wherein a weight applied to the sixth symbol and to the eighth symbol is e jθ , wherein θ is in a range from zero to around π/2.

18. A non-transitory computer-readable medium containing a sequence of instructions, which when executed by a computing device, causes the computing device to:

convert a data stream to a symbol set;

select a first plurality of symbols from the symbol set, wherein the first plurality of symbols includes at least a first symbol, a second symbol, a third symbol, and a fourth symbol, wherein any of the symbols includes a first part and a second part;

generate a second plurality of symbols having at least a fifth symbol and a sixth symbol, wherein the fifth symbol includes the first part of the first symbol and the second part of the second symbol and the sixth symbol includes the first part of the third symbol and the second part of the fourth symbol;

weight the sixth symbol to form a first weighted symbol; and

transmit in a first time slot the fifth symbol with a first antenna and the first weighted symbol with a second antenna.

19. The non-transitory computer-readable medium of claim 18 , further including a sequence of instructions, which when executed by the computing device, causes the computing device to

generate a seventh symbol and an eighth symbol, wherein the seventh symbol includes the first part of the second symbol and the second part of the first symbol and the eighth symbol includes the first part of the fourth symbol and the second part of the third symbol;

weight the eighth symbol to form a second weighted symbol; and

transmit in a second time slot the second weighted symbol with the first antenna and the seventh symbol with the second antenna.

20. The non-transitory computer-readable medium of claim 19 , wherein a weight applied to the sixth symbol and to the eighth symbol is e jθ , wherein θ is in a range from zero to around π/2.