Method and apparatus to correct channel quality indicator estimation

• US 20070071145A1
• Filed: 09/23/2005
• Published: 03/29/2007
• Est. Priority Date: 09/23/2005
• Status: Abandoned Application

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Perets, Yona
• Application Number:
  US11/232,970
• Publication Number:
  US 20070071145A1
• Time in Patent Office: Days
• US Class Current: 375/346
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/20 using signal quality detector

Abstract

Embodiments of the present invention provide a method and apparatus to correct channel quality indicator estimation with advanced receivers. Demonstrative embodiments of the invention include a receiver having an estimator to estimate a channel quality indicator value of a channel according to one or more estimated base values and a correction value, wherein said estimated base values correspond to one or more parameters of a received reference signal, and said correction value corresponds to a comparison between at least one of said reference signal parameters and at least one parameter relating to a received data signal. Additional features are described and claimed.

Claims

1. An apparatus comprising:

an estimator to estimate a channel quality indicator value of a channel according to one or more estimated base values and a correction value, wherein said estimated base values correspond to one or more parameters of a received reference signal, and said correction value corresponds to a comparison between at least one of said reference signal parameters and at least one parameter relating to a received data signal.

2. The apparatus of claim 1, comprising a comparer to generate a correction signal to provide said correction value based on said comparison.

3. The apparatus of claim 1, comprising an advanced receiver module to provide values of said data signal parameters based on an advanced receiving algorithm.

4. The apparatus of claim 3, wherein said advanced receiving algorithm is to provide pilot interference cancellation.

5. The apparatus of claim 3, wherein said advanced receiving algorithm is to provide chip rate equalization.

6. The apparatus of claim 1, comprising a basic receiver module to estimate said base values from a received reference signal.

7. The apparatus of claim 6, wherein said basic receiver module comprises a rake receiver module.

8. The apparatus of claim 6, wherein said base values comprise a noise variance estimation value of said received reference signal.

9. The apparatus of claim 6, wherein said base values comprise a channel estimation value of said received reference signal.

10. The apparatus of claim 1, wherein said received reference signal is a pilot signal.

11. A method comprising:

estimating a channel quality indicator value of a channel according to one or more estimated base values and a correction value, wherein said estimated base values correspond to one or more parameters of a received reference signal, and said correction value corresponds to a comparison between at least one of said reference signal parameters and at least one parameter relating to a received data signal.

12. The method of claim 11, wherein estimating said estimated base values comprises estimating a pilot signal power value and a pilot signal noise value.

13. The method of claim 12, wherein estimating said channel quality indicator value comprises calculating a ratio between said pilot signal power value and the difference of said pilot signal noise value and said correction value

14. The method of claim 13, wherein comparing said parameter of a received reference signal and said parameter of a received data signal, to produce said correction value, comprises estimating a cancelled pilot power component of said received data signal related to a pilot signal interference cancellation operation.

15. The method of claim 12, wherein estimating said channel quality indicator value comprises calculating a ratio between said pilot signal power value and said pilot signal noise value, and multiplying the result by said correction value.

16. The method of claim 15, wherein comparing said parameter of a received reference signal and said parameter of a received data signal, to produce said correction value, comprises estimating a ratio of symbol signal-to-noise ratios of said received data signal, between a chip rate equalizer receiver and a rake receiver

17. A wireless communication system comprising:

at least one wireless communication device comprising;

a radio frequency antenna to send and receive signals; and

a receiver having an estimator to estimate a channel quality indicator value of a channel according to one or more estimated base values and a correction value, wherein said estimated base values correspond to one or more parameters of a received reference signal, and said correction value corresponds to a comparison between at least one of said reference signal parameters and at least one parameter relating to a received data signal.

18. A wireless communication system according to claim 17, wherein said receiver further comprises a comparer to generate a correction signal to provide said correction value based on said comparison.

19. A wireless communication system according to claim 17, wherein said receiver further comprises an advanced receiver module to provide values of said data signal parameters based on an advanced receiving algorithm.

20. A wireless communication system according to claim 17, wherein said receiver further comprises a basic receiver module to estimate said base values from a received reference signal.

21. A wireless communication system according to claim 17, further comprising an additional wireless communication device to send said reference signal and said data signal over a link of a wireless communication network.

22. A wireless communication system according to claim 17, further comprising an additional wireless communication device to receive said channel quality indicator value over a link of a wireless communication network.