Granted Patent B2

US 7,746,886 · App. 10/979,368 · Granted Jun 29, 2010

Abstract

Claims (70)

1. A method for asymmetrical MIMO wireless communication, the method comprises:

determining a number of transmission antennas for the asymmetrical MIMO wireless communication;

determining a number of reception antennas for the asymmetrical MIMO wireless communication;

determining whether the asymmetric MIMO wireless communication will use spatial multiplexing or space-time block coding by:

using the spatial multiplexing whenever the number of reception antennas equals or exceeds the number of transmission antennas; and

using the spatial time block coding whenever the number of reception antennas is less than the number of transmission antennas, wherein, when both the number of reception antennas is an even number and the number of transmission antennas exceeds the number of reception antennas by an odd number, the spatial time block coding comprises:

selecting one of the transmission antennas for transmitting non-spatial time block coding constellation points during first and second time intervals; and

grouping remaining transmission antennas of the transmission antennas into at least one group of transmission antennas, wherein the at least one group of transmission antennas transmits spatial time block coding constellation points.

2. The method of claim 1 , wherein the determining the number of reception antennas comprises:

receiving, from a receiving wireless communication device, the number of reception antennas.

3. The method of claim 1 , wherein the selecting one of the transmission antennas comprises:

from spatial-time coding interval to spatial-time coding interval, selecting another one of the transmission antennas for transmitting the non-spatial time block coding constellation points.

4. The method of claim 1 , wherein, when the number of transmission antennas exceeds the number of reception antennas by an even number, the spatial time block coding comprises:

dividing the transmission antennas into at least two groups, where each of the at least two groups includes at least two of the transmission antennas; and

individually performing the spatial time block coding for the at least two groups.

5. The method of claim 4 further comprises:

from spatial-time coding interval to spatial-time coding interval, dividing the transmission antennas into at least two different groups.

6. A method for asymmetrical MIMO wireless communication, the method comprises:

determining a number of transmission antennas for the asymmetrical MIMO wireless communication;

determining a number of reception antennas for the asymmetrical MIMO wireless communication;

whenever the number of transmission antennas exceeds the number of reception antennas, using spatial time block coding for the asymmetrical MTMO wireless communication, wherein, when both the number of reception antennas is an even number and the number of transmission antennas exceeds the number of reception antennas by an odd number, the spatial time block coding comprises:

selecting one of the transmission antennas for transmitting non-spatial time block coding constellation points during first and second time intervals; and

grouping remaining transmission antennas of the transmission antennas into at least one group of transmission antennas, wherein the at least one group of transmission antennas transmits spatial time block coding constellation points; and

whenever the number of transmission antennas does not exceed the number of reception antennas, using spatial multiplexing for the asymmetrical MIMO wireless communication.

7. The method of claim 6 , wherein the determining the number of reception antennas comprises:

receiving, from a receiving wireless communication device, the number of reception antennas.

8. The method of claim 7 , wherein the selecting one of the transmission antennas comprises:

from spatial-time coding interval to spatial-time coding interval, selecting another one of the transmission antennas for transmitting the non-spatial time block coding constellation points.

9. The method of claim 6 , wherein, when the number of transmission antennas exceeds the number of reception antennas by an even number, the spatial time block coding comprises:

dividing the transmission antennas into at least two groups, where each of the at least two groups includes at least two of the transmission antennas; and

individually performing the spatial time block coding for the at least two groups.

10. The method of claim 9 further comprises:

from spatial-time coding interval to spatial-time coding interval, dividing the transmission antennas into at least two different groups.

11. A radio frequency (RF) transmitter comprises:

a baseband processing module operably coupled to convert outbound data into an outbound symbol stream; and

a transmitter section operably coupled to convert the outbound symbol stream into outbound RF signals, wherein the transmitter section includes transmission antennas, and wherein the baseband processing module is further operably coupled to:

determine a number of the transmission antennas for the asymmetrical MIMO wireless communication;

determine a number of reception antennas for the asymmetrical MIMO wireless communication;

determine whether the asymmetric MIMO wireless communication will use spatial multiplexing or space-time block coding by:

using the spatial multiplexing whenever the number of reception antennas equals or exceeds the number of transmission antennas; and

using the spatial time block coding whenever the number of reception antennas is less than the number of transmission antennas wherein when both the number of reception antennas is an even number and the number of transmission antennas exceeds the number of reception antennas by an odd number, perform the spatial time block coding by:

selecting one of the transmission antennas for transmitting non-spatial time block coding constellation points during first and second time intervals; and

grouping remaining transmission antennas of the transmission antennas into at least one group of transmission antennas, wherein the at least one group of transmission antennas transmits spatial time block coding constellation points.

12. The RF transmitter of claim 11 , wherein the baseband processing module is further operably coupled to determine the number of reception antennas by:

receiving, from a receiving wireless communication device, the number of reception antennas.

13. The RF transmitter of claim 11 , wherein the baseband processing module is further operably coupled to select one of the transmission antennas by:

from spatial-time coding interval to spatial-time coding interval, selecting another one of the transmission antennas for transmitting the non-spatial time block coding constellation points.

14. The RF transmitter of claim 11 , wherein the baseband processing module is further operably coupled to, when the number of transmission antennas exceeds the number of reception antennas by an even number, perform the spatial time block coding by:

dividing the transmission antennas into at least two groups, where each of the at least two groups includes at least two of the transmission antennas; and

individually performing the spatial time block coding for the at least two groups.

15. The RF transmitter of claim 14 , wherein the baseband processing module is further operably coupled to:

from spatial-time coding interval to spatial-time coding interval, divide the transmission antennas into at least two different groups.

16. A radio frequency (RF) transmitter comprises:

a baseband processing module operably coupled to convert outbound data into an outbound symbol stream; and

a transmitter section operably coupled to convert the outbound symbol stream into outbound RF signals, wherein the transmitter section includes transmission antennas, and wherein the baseband processing module is further operably coupled to:

determine a number of transmission antennas for the asymmetrical MIMO wireless communication;

determine a number of reception antennas for the asymmetrical MIMO wireless communication;

whenever the number of transmission antennas exceeds the number of reception antennas, use spatial time block coding for the asymmetrical MIMO wireless communication wherein, when both the number of reception antennas is an even number and the number of transmission antennas exceeds the number of reception antennas by an odd number, perform the spatial time block coding by:

selecting one of the transmission antennas for transmitting non-spatial time block coding constellation points during first and second time intervals; and

grouping remaining transmission antennas of the transmission antennas into at least one group of transmission antennas, wherein the at least one group of transmission antennas transmits spatial time block coding constellation points; and

whenever the number of transmission antennas does not exceed the number of reception antennas, use spatial multiplexing for the asymmetrical MIMO wireless communication.

17. The RF transmitter of claim 16 , wherein the baseband processing module is further operably coupled to determine the number of reception antennas by:

receiving, from a receiving wireless communication device, the number of reception antennas.

18. The RF transmitter of claim 16 , wherein the baseband processing module is further operably coupled to select one of the transmission antennas by:

from spatial-time coding interval to spatial-time coding interval, selecting another one of the transmission antennas for transmitting the non-spatial time block coding constellation points.

19. The RF transmitter of claim 16 , wherein the baseband processing module is further operably coupled to, when the number of transmission antennas exceeds the number of reception antennas by an even number, perform the spatial time block coding by:

dividing the transmission antennas into at least two groups, where each of the at least two groups includes at least two of the transmission antennas; and

individually performing the spatial time block coding for the at least two groups.

20. The RF transmitter of claim 16 , wherein the baseband processing module is further operably coupled to:

from spatial-time coding interval to spatial-time coding interval, divide the transmission antennas into at least two different groups.

Assignments (8)