Precoding Data Based on Forwarded Channel Condition Information

• US 20120051282A1
• Filed: 09/01/2010
• Published: 03/01/2012
• Est. Priority Date: 09/01/2010
• Status: Active Grant

• Current Assignee: Empire Technology Development LLC (Allied Inventors Management, LLC)
• Original Assignee: Empire Technology Development LLC (Allied Inventors Management, LLC)
• Inventors: Kruglick, Ezekiel
• Granted Patent: US 10,009,824 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 25/03949 equalizer selection or adaptation based on feedback multiple signaling inclusive of a precoding command for adapting the transmitter H04L1/0031; feedback for transmit diversity systems H04B7/0619; selection of codebook or precoding matrix for MIMO diversity systems H04B7/0456
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04W 4/40 for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 40/12 based on transmission quality or channel quality
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Examples are disclosed for forwarding channel condition information for a wireless communication channel and precoding data to be transmitted over the wireless communication channel based on the forwarded channel condition information.

Claims

1. A method comprising:

determining channel condition information for a wireless communication channel between a first wireless device having a single antenna and a second wireless device having a plurality of antennae; and

forwarding the channel condition information to the first wireless device, wherein based on the forwarded channel condition information, the first wireless device is to precode data to be transmitted via one or more of a plurality of frequencies associated with the wireless communication channel.

2. A method according to claim 1, wherein channel condition information includes one of a signal-to-noise ratio for the one or more frequencies, a distortion associated with one or more frequencies, a bit error rate associated with the one or more frequencies or a fading characteristic associated with the one or more frequencies.

3. A method according to claim 1, further comprising:

determining whether channel condition information indicates that one or more frequencies of the plurality of frequencies has exceeded a change threshold for a quality metric that characterizes the one or more frequencies; and

forwarding the channel condition information if the rate of change threshold has not been exceeded.

4. A method according to claim 3, wherein the quality metric includes one of a signal-to-noise ratio for the one or more frequencies, a bit error rate associated with the one or more frequencies or a fading characteristic associated with the one or more frequencies.

5. A method according to claim 1, wherein determining the channel condition information comprise determining the channel condition information based on characterization information obtained from the plurality of antennae of the second wireless device while the second wireless device is communicatively coupled with the first wireless device via the wireless communication channel.

6. A method according to claim 5, wherein the characterization information includes one of a signal-to-noise ratio for the one or more frequencies, a distortion associated with one or more frequencies, a bit error rate associated with the one or more frequencies or a fading characteristic associated with the one or more frequencies.

7. A method comprising:

receiving channel condition information via a single antenna from a transmitter having a plurality of antennae, the channel condition information including information associated with transmitting data to the transmitter via one or more of a plurality of frequencies associated with the wireless communication channel;

precoding data to be transmitted to the transmitter via the one or more of the plurality of frequencies based on the channel condition information; and

transmitting the precoded data to the transmitter via the one or more of the plurality of frequencies.

8. A method according to claim 7, wherein precoding includes one of spatial beamforming or spatial coding.

9. A method according to claim 8, wherein channel condition information includes one of a signal-to-noise ratio for the one or more frequencies, a distortion associated with one or more frequencies, a bit error rate associated with the one or more frequencies or a fading characteristic associated with the one or more frequencies.

10. A method according to claim 7, wherein the channel condition information is determined based on characterization information obtained from the plurality of antennae of the transmitter while the transmitter is coupled with the wireless communication channel.

11. A method according to claim 10, wherein the characterization information includes one of a signal-to-noise ratio for the one or more frequencies, a distortion associated with one or more frequencies, a bit error rate associated with the one or more frequencies or a fading characteristic associated with the one or more frequencies.

12. An apparatus comprising:

a channel condition manager, the channel condition manager including logic configured to;

determine channel condition information for a wireless communication channel between a first wireless device having a single antenna and a second wireless device having a plurality of antennae; and

forward the channel condition information to the first wireless device, wherein based on the forwarded channel condition information, the first wireless device is to precode data to be transmitted via one or more of a plurality of frequencies associated with the wireless communication channel.

13. An apparatus according to claim 12, wherein to determine the channel condition information comprises to determine the channel condition information based on characterization information obtained from the plurality of antennae of the second wireless device while the second wireless device is communicatively coupled with the first wireless device via the wireless communication channel.

14. An apparatus according to claim 13, wherein the characterization information includes one of a signal-to-noise ratio for the one or more frequencies, a distortion associated with one or more frequencies, a bit error rate associated with the one or more frequencies or a fading characteristic associated with the one or more frequencies.

15. An apparatus comprising:

a precode manager, the precode manager including logic configured to;

receive channel condition information via a single antenna from a transmitter having a plurality of antennae, the channel condition information including information associated with transmitting data to the transmitter via one or more of a plurality of frequencies associated with the wireless communication channel;

precode data to be transmitted to the transmitter via the one or more of the plurality of frequencies based on the channel condition information; and

transmit the precoded data to the transmitter via the one or more of the plurality of frequencies.

16. An apparatus according to claim 15, wherein to precode includes one of spatial beamforming or spatial coding.

17. An apparatus according to claim 16, wherein channel condition information includes one of a signal-to-noise ratio for the one or more frequencies, a distortion associated with one or more frequencies, a bit error rate associated with the one or more frequencies or a fading characteristic associated with the one or more frequencies.

18. A system to forward channel condition information comprising:

an antenna array including a plurality of antennae; and

a channel condition manager, the channel condition manager including logic configured to;

determine channel condition information for a wireless communication channel with a wireless device having a single antenna; and

forward the channel condition information to the wireless device, wherein based on the forwarded channel condition information, the wireless device is to precode data to be transmitted via one or more of a plurality of frequencies associated with the wireless communication channel.

19. A system according to claim 18, wherein to determine the channel condition information comprises to determine the channel condition information based on characterization information obtained from the antenna array while the antenna array is coupled with the wireless communication channel.

20. A system according to claim 19, wherein the characterization information includes one of a signal-to-noise ratio for the one or more frequencies, a distortion associated with one or more frequencies, a bit error rate associated with the one or more frequencies or a fading characteristic associated with the one or more frequencies.

21. A computer program product comprising a signal bearing medium having instructions for transmitting precoded data over a wireless communication channel, which, when executed by logic, cause the logic to:

receive channel condition information via a single antenna from a transmitter having a plurality of antennae, the channel condition information including information associated with transmitting data to the transmitter via one or more of a plurality of frequencies associated with the wireless communication channel;

precode data to be transmitted to the transmitter via the one or more of the plurality of frequencies based on the channel condition information; and

transmit the precoded data to the transmitter via the one or more of the plurality of frequencies.

22. A computer program product according to claim 21, wherein the channel condition information is determined based on characterization information obtained from the plurality of antennae of the transmitter while the transmitter is coupled with the wireless communication channel.

23. A computer program product according to claim 22, wherein the characterization information includes one of a signal-to-noise ratio for each frequency of the plurality of frequencies, a distortion associated with one or more frequencies, a bit error rate associated with each frequency of the plurality of frequencies or a fading characteristic associated with each frequency of the plurality of frequencies.