Wireless communication device with configurable spatial time-frequency coding and methods for use therewith
View Patent ↗A communication device includes a transmitter section that select a coding as either space time block coding (STBC), space frequency block coding (SFBC), hybrid space time/frequency block coding (ST/FBC), or a single stream multi-antenna spatial mapping. The transmitter section generates a transmit signal in accordance with the selected coding and transmits the transmit signal to the remote communication device via a plurality of antennas.
1. A communication device, comprising:
a baseband processing module to:
generate a channel estimate of at least one communication pathway between the communication device and the at least one remote communication device having a plurality of transmit antennas; and
based on the channel estimate, generate a feedback signal including a selected one of: space time block coding (STBC), space frequency block coding (SFBC), hybrid space time/frequency block coding (ST/FBC), or single stream multi-antenna spatial mapping wherein the baseband processing module generates the feedback signal by:
when one of a plurality of channel correlations exceeds a threshold, select one of: the STBC, SFBC, or hybrid ST/FBC, and generate the feedback signal based on selection thereof;
when the one of the plurality of channel correlations does not exceed the threshold, select single stream multi-antenna spatial mapping and generate the feedback signal based on selection thereof;
a transmitter, coupled to the baseband processing module to:
transmit the feedback signal to the remote communication device.
2. The communication device of claim 1 , wherein:
the feedback signal includes 2 bits having a first set of values of the 2 bits corresponding to STBC, a second set of values of the 2 bits corresponding to SFBC, a third set of values of the 2 bits corresponding to hybrid ST/FBC, or a fourth set of values of the 2 bits corresponding to single stream multi-antenna spatial mapping.
3. The communication device of claim 1 , wherein the baseband processing module generates the feedback signal by calculating a plurality of channel correlations based on at least one of the channel estimate and at least one additional channel estimate.
4. The communication device of claim 1 , wherein the communication device is one of: a wireless station (STA) or a wireless access point (AP).
5. The communication device of claim 1 , wherein the baseband processing module generates the feedback signal by:
characterizing the channel estimate based on at least one of a fading characteristic and a frequency response characteristic to generate a characterization of the channel estimate.
6. The communication device of claim 1 , wherein the remote communication device is one of: a wireless station (STA) and a wireless access point (AP).
7. The communication device of claim 1 , wherein the remote communication device is an access point (AP).
8. A communication device, comprising:
a receiver to:
receive a feedback signal from a remote communication device;
a transmitter, coupled to the receiver, to:
select a coding, based on the feedback signal, as one of: space time block coding (STBC), space frequency block coding (SFBC), hybrid space time/frequency block coding (ST/FBC), or single stream multi-antenna spatial mapping, wherein the remote communication device generates the feedback signal by:
when one of a plurality of channel correlations exceeds a threshold, select one of: the STBC, SFBC, or hybrid ST/FBC, and generate the feedback signal based on selection thereof;
when the one of the plurality of channel correlations does not exceed the threshold, select single stream multi-antenna spatial mapping and generate the feedback signal based on selection thereof;
generate a transmit signal in accordance with the selected coding; and
transmit the transmit signal to the remote communication device via a plurality of antennas.
9. The communication device of claim 8 , wherein:
the feedback signal includes 2 bits having a first set of values of the 2 bits corresponding to STBC, a second set of values of the 2 bits corresponding to SFBC, a third set of values of the 2 bits corresponding to hybrid ST/FBC, or a fourth set of values of the 2 bits corresponding to single stream multi-antenna spatial mapping.
10. The communication device of claim 8 , wherein the remote communication device generates the feedback signal by calculating a plurality of channel correlations based on at least one of the feedback signal or at least one additional feedback signal.
11. The communication device of claim 8 , wherein the communication device is one of: a wireless station (STA) or a wireless access point (AP).
12. The communication device of claim 8 , wherein the remote communication device generates the feedback signal by:
characterizing feedback signal based on at least one of a fading characteristic and a frequency response characteristic to generate a characterization of the feedback signal.
13. The communication device of claim 8 , wherein the remote communication device is a wireless station (STA).
14. The communication device of claim 8 , wherein the remote communication device is an access point (AP).
15. A communication device, comprising:
a transmitter to:
select a coding as one of: space time block coding (STBC), space frequency block coding (SFBC), hybrid space time/frequency block coding (ST/FBC), or single stream multi-antenna spatial mapping, wherein the transmitter selects the coding by:
when one of a plurality of channel correlations exceeds a threshold, select one of: the STBC, SFBC, or hybrid ST/FBC;
when the one of the plurality of channel correlations does not exceed the threshold, select single stream multi-antenna spatial mapping;
generate a transmit signal in accordance with the selected coding; and
transmit the transmit signal to a remote communication device via a plurality of antennas.
16. The communication device of claim 15 , wherein the hybrid space time/frequency block coding (ST/FBC) includes N symbols processed in blocks of A time symbols and B frequency symbols, where N=A+B.
17. The communication device of claim 16 , wherein the remote communication device recovers transmitted data by combining the A time symbols and B frequency symbols.
18. The communication device of claim 15 , wherein the hybrid space time/frequency block coding (ST/FBC) includes blocks four symbols into a combination of two time symbols and two frequency symbols.
19. The communication device of claim 15 , wherein the remote communication device is a wireless station (STA).
20. The communication device of claim 15 , wherein the remote communication device is a wireless access point (AP).