Wireless communication receiver with phase noise estimation and phase noise compensation performed after channel estimation, and related wireless communication receiving method and phase noise compensation apparatus

• US 9,036,747 B2
• Filed: 11/09/2011
• Issued: 05/19/2015
• Est. Priority Date: 11/09/2011
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Lin, Chih-Hsiu, Chiang, Chia-Hsien, Maa, Ching-Shyang
• Primary Examiner(s): Vlahos, Sophia
• Application Number:
  US13/293,084
• Publication Number:
  US 20130114661A1
• Time in Patent Office: 1,287 Days
• Field of Search: 375/260, 375/326, 375/340, 375/346, 370/208, 370/210
• US Class Current: 375/346
• CPC Class Codes: H04L 2027/0026 Correction of carrier offset
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 27/2695 with channel estimation, e.g. determination of delay spread, derivative or peak tracking channel estimation H04L25/0202

Abstract

A wireless communication receiver includes a first signal processing block, a phase noise compensation apparatus, and a second signal processing block. The first signal processing block is arranged for generating a first processed output by processing a reception signal, wherein the first signal processing block includes a channel estimation unit arranged for performing channel estimation. The phase noise compensation apparatus is arranged for receiving the first processed output and generating a second processed output by performing phase noise compensation according to the received first processed output. The second signal processing block is arranged for receiving the second processed output and processing the received second processed output.

Claims

1. A wireless communication receiver, comprising:

a first signal processing block, configured to generate a first processed output by processing a reception signal, wherein the first signal processing block includes a channel estimation unit configured to perform channel estimation;

a phase noise compensation apparatus, configured to receive the first processed output, and generate a second processed output by performing phase noise compensation according to the received first processed output and adjusting channel state information according to the phase noise compensation, wherein the second processed output includes phase noise compensated data and adjusted channel state information; and

a second signal processing block, configured to receive the second processed output and process the received second processed output, wherein the second signal processing block includes a forward error correction unit configured to refer to the adjusted channel state information for performing forward error correction upon the phase noise compensated data.

2. The wireless communication receiver of claim 1, wherein the phase noise compensation apparatus is coupled between the channel estimation unit and the forward error correction unit.

3. The wireless communication receiver of claim 2, wherein the phase noise compensation apparatus comprises:

a common phase error estimation unit, configured to estimate a common phase error of the first processed output according to the first processed output and a channel estimation result generated from the channel estimation unit;

an equalizer, configured to generate an equalized signal by equalizing the first processed output according to the channel estimation result; and

a common phase error compensation unit, configured to perform a common phase error compensation upon the equalized signal according to the common phase error estimated by the common phase error estimation unit.

4. The wireless communication receiver of claim 3, wherein the phase noise compensation apparatus further comprises:

a noise estimation unit, configure to generate a compensation parameter corresponding to the common phase error;

a channel state information unit, configured to generate the channel state information according to the first processed output; and

a channel state information compensation unit, configured to adjust the channel state information according to the compensation parameter.

5. The wireless communication receiver of claim 4, wherein the noise estimation unit is configured to generate the compensation parameter according to the common phase error, the first processed output, and the channel estimation result.

6. The wireless communication receiver of claim 4, wherein the compensation parameter is a weighting value, and the channel state information compensation unit is configured to generate adjusted channel state information by multiplying the channel state information with the weighting value.

7. The wireless communication receiver of claim 1, wherein the phase noise compensation apparatus comprises:

a common phase error estimation unit, configured to estimate a common phase error of the first processed output;

an equalizer, configured to generate an equalized signal by equalizing the first processed output; and

a common phase error compensation unit, configured to perform a common phase error compensation upon the equalized signal according to the common phase error estimated by the common phase error estimation unit.

8. The wireless communication receiver of claim 7, wherein the phase noise compensation apparatus further comprises:

a noise estimation unit, configured to generate a compensation parameter corresponding to the common phase error;

a channel state information unit, configured to generate the channel state information according to the first processed output; and

a channel state information compensation unit, configured to adjust the channel state information according to the compensation parameter.

9. The wireless communication receiver of claim 8, wherein the compensation parameter is a weighting value, and the channel state information compensation unit is configured to generate adjusted channel state information by multiplying the channel state information with the weighting value.

10. A wireless communication receiving method, comprising:

performing a first signal processing operation for processing a reception signal to generate a first processed output, wherein the first signal processing operation includes channel estimation;

generating a second processed output by performing phase noise compensation according to the first processed output and adjusting channel state information according to the phase noise compensation, wherein the second processed output includes phase noise compensated data and adjusted channel state information; and

performing a second signal processing operation upon the second processed output, wherein the second signal processing operation includes referring to the adjusted channel state information to perform forward error correction upon the phase noise compensated data.

11. The wireless communication receiving method of claim 10, wherein a channel estimation result generated from the channel estimation is directly used by the phase noise compensation, and the second processed output is directly used by the forward error correction.

12. The wireless communication receiving method of claim 11, wherein the phase noise compensation comprises:

estimating a common phase error according to the first processed output and the channel estimation result;

generating an equalized signal by equalizing the first processed output according to the channel estimation result; and

performing a common phase error compensation upon the equalized signal according to the estimated common phase error.

13. The wireless communication receiving method of claim 12, wherein the step of adjusting the channel state information according to the phase noise compensation comprises:

generating a compensation parameter corresponding to the common phase error;

generating the channel state information according to the first processed output; and

adjusting the channel state information according to the compensation parameter.

14. The wireless communication receiving method of claim 13, wherein the step of generating the compensation parameter comprises:

generating the compensation parameter according to the common phase error, the first processed output, and the channel estimation result.

15. The wireless communication receiving method of claim 13, wherein the compensation parameter is a weighting value, and the step of adjusting the channel state information comprises:

generating adjusted channel state information by multiplying the channel state information with the weighting value.

16. The wireless communication receiving method of claim 10, wherein the phase noise compensation comprises:

estimating a common phase error of the first processed output;

generating an equalized signal by equalizing the first processed output; and

performing a common phase error compensation upon the equalized signal according to the estimated common phase error.

17. The wireless communication receiving method of claim 16, wherein the step of adjusting the channel state information according to the phase noise compensation comprises:

generating a compensation parameter corresponding to the common phase error;

generating the channel state information according to the first processed output; and

adjusting the channel state information according to the compensation parameter.

18. The wireless communication receiving method of claim 17, wherein the compensation parameter is a weighting value, and the step of adjusting the channel state information comprises:

generating adjusted channel state information by multiplying the channel state information with the weighting value.

19. A phase noise compensation apparatus, comprising:

a common phase error estimation unit, configured to estimate a common phase error of an input signal;

an equalizer, configured to generate an equalized signal by equalizing the input signal;

a common phase error compensation unit, configured to perform a common phase error compensation upon the equalized signal according to the common phase error estimated by the common phase error estimation unit;

a noise estimation unit, configured to generate a compensation parameter corresponding to the common phase error;

a channel state information unit, configured to generate channel state information according to the input signal; and

a channel state information compensation unit, configured to adjust the channel state information according to the compensation parameter.

20. A wireless communication receiver, comprising:

a first signal processing block, configured to generate a first processed output by processing a reception signal, wherein the first signal processing block includes a channel estimation unit configured to perform channel estimation;

a phase noise compensation apparatus, configured to receive the first processed output, and generate a second processed output by performing phase noise compensation according to the received first processed output and adjusting channel state information according to the phase noise compensation; and

a second signal processing block, configured to receive the second processed output and process the received second processed output;

wherein the second signal processing block includes a forward error correction unit, and the phase noise compensation apparatus is coupled between the channel estimation unit and the forward error correction unit;

wherein the phase noise compensation apparatus comprises;

a common phase error estimation unit, configured to estimate a common phase error of the first processed output according to the first processed output and a channel estimation result generated from the channel estimation unit;

an equalizer, configured to generate an equalized signal by equalizing the first processed output according to the channel estimation result;

a common phase error compensation unit, configured to perform a common phase error compensation upon the equalized signal according to the common phase error estimated by the common phase error estimation unit;

a noise estimation unit, configure to generate a compensation parameter corresponding to the common phase error;

a channel state information unit, configured to generate the channel state information according to the first processed output; and

a channel state information compensation unit, configured to adjust the channel state information according to the compensation parameter.

21. A wireless communication receiver, comprising:

a first signal processing block, configured to generate a first processed output by processing a reception signal, wherein the first signal processing block includes a channel estimation unit configured to perform channel estimation;

a phase noise compensation apparatus, configured to receive the first processed output, and generate a second processed output by performing phase noise compensation according to the received first processed output and adjusting channel state information according to the phase noise compensation; and

a second signal processing block, configured to receive the second processed output and process the received second processed output;

wherein the phase noise compensation apparatus comprises;

a common phase error estimation unit, configured to estimate a common phase error of the first processed output;

an equalizer, configured to generate an equalized signal by equalizing the first processed output;

a common phase error compensation unit, configured to perform a common phase error compensation upon the equalized signal according to the common phase error estimated by the common phase error estimation unit;

a noise estimation unit, configured to generate a compensation parameter corresponding to the common phase error;

a channel state information unit, configured to generate the channel state information according to the first processed output; and

a channel state information compensation unit, configured to adjust the channel state information according to the compensation parameter.

22. A wireless communication receiving method, comprising:

performing a first signal processing operation for processing a reception signal to generate a first processed output, wherein the first signal processing operation includes channel estimation;

generating a second processed output by performing phase noise compensation according to the first processed output and adjusting channel state information according to the phase noise compensation; and

performing a second signal processing operation upon the second processed output;

wherein the second signal processing operation includes forward error correction, a channel estimation result generated from the channel estimation is directly used by the phase noise compensation, and the second processed output is directly used by the forward error correction;

wherein the phase noise compensation comprises;

estimating a common phase error according to the first processed output and the channel estimation result;

generating an equalized signal by equalizing the first processed output according to the channel estimation result; and

performing a common phase error compensation upon the equalized signal according to the estimated common phase error;

wherein the step of adjusting the channel state information according to the phase noise compensation comprises;

generating a compensation parameter corresponding to the common phase error;

generating the channel state information according to the first processed output; and

adjusting the channel state information according to the compensation parameter.

23. A wireless communication receiving method, comprising:

performing a first signal processing operation for processing a reception signal to generate a first processed output, wherein the first signal processing operation includes channel estimation;

generating a second processed output by performing phase noise compensation according to the first processed output and adjusting channel state information according to the phase noise compensation; and

performing a second signal processing operation upon the second processed output;

wherein the phase noise compensation comprises;

estimating a common phase error of the first processed output;

generating an equalized signal by equalizing the first processed output; and

performing a common phase error compensation upon the equalized signal according to the estimated common phase error;

wherein the step of adjusting the channel state information according to the phase noise compensation comprises;

generating a compensation parameter corresponding to the common phase error;

generating the channel state information according to the first processed output; and

adjusting the channel state information according to the compensation parameter.