Communication system with repeat-response combining mechanism and method of operation thereof

• US 9,954,643 B2
• Filed: 06/03/2013
• Issued: 04/24/2018
• Est. Priority Date: 06/22/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: El-Khamy, Mostafa, Lee, Jungwon, Kang, Inyup
• Primary Examiner(s): Skripnikov, Alex
• Assistant Examiner(s): Thomas, Wilfred
• Application Number:
  US13/908,765
• Publication Number:
  US 20130343271A1
• Time in Patent Office: 1,786 Days
• CPC Class Codes: H04L 1/004 by using forward error control H04L1/0618 takes precedence; coding, decoding or code conversion, for error detection or correction H03M13/00
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining

Abstract

A communication system includes: a validation module configured to transmit a repeat request corresponding to a preceding data including a communication content; an inter-block processing module, coupled to the validation module, configured to determine a previous communication value based on the preceding data; a detection module, coupled to the inter-block processing module, configured to identify a repeat data corresponding to the repeat request from a receiver signal; an accumulator module, coupled to the detection module, configured to generate an accumulation output based on the preceding data and the repeat data; and a decoding module, coupled to the accumulator module, configured to determine the communication content using the previous communication value and the accumulation output across instances of transmission blocks for communicating with a device.

Claims

1. A requesting device of a communication system comprising:

an antenna configured to;

receive preceding data including a communication content corresponding to an instance of a transmission block;

transmit a repeat request corresponding to an error detection status for the preceding data;

receive a receiver signal corresponding to a further instance of the transmission block subsequent to the repeat request;

a control unit, coupled to the antenna, configured to;

determine a previous communication value resulting from decoding the preceding data for generating the error detection status of the preceding data;

identify a repeat data corresponding to the repeat request from the receiver signal;

generate an accumulation output including systematic channel log-likelihood ratios (LLRs), subsequent to de-interleaving the receiver signal and de-puncturing the repeat data, based on combining the preceding data and the repeat data, and a repeat detection result and a preceding detection result; and

determine the communication content based on decoding the accumulation output using the previous communication value and the accumulation output.

2. The system as claimed in claim 1 wherein the control unit is configured to:

generate a previous inner-decoder value based on a further-decoder extrinsic value corresponding to the preceding data; and

determine a base-decoder a-priori value corresponding to the repeat data based on the previous inner-decoder value.

3. The system as claimed in claim 1 wherein the control unit is configured to:

calculate a decoding output corresponding to the preceding data;

determine a previous overall-decoding value based on the decoding output; and

calculate a detector extrinsic value corresponding to the repeat data based on the previous overall-decoding value for determining the communication content by combining the preceding data and the repeat data.

4. The system as claimed in claim 1 wherein the control unit is configured to:

calculate a decoding output corresponding to the preceding data;

determine a previous overall-decoding value based on the decoding output; and

determine a detector output corresponding to the repeat data based on the previous overall-decoding value.

5. The system as claimed in claim 1 wherein the control unit is configured to:

generate the preceding detection result based on receiving the preceding data and the repeat detection result corresponding to the repeat data; and

generate a puncturing output based on the preceding detection result for combining the puncturing output and the repeat detection result with an accumulator module.

6. The system as claimed in claim 1 wherein the control unit is configured to generate the repeat detection result based on the preceding detection result corresponding to receiving the preceding data.

7. The system as claimed in claim 1 wherein the control unit is configured to:

generate the preceding detection result based on receiving the preceding data;

calculate a decoding output corresponding to the preceding data;

determine a previous overall-decoding value based on the decoding output; and

generate a puncturing output based on the preceding detection result and the previous overall- decoding value for combining the puncturing output and the repeat detection result with an accumulator module.

8. The system as claimed in claim 1 wherein the control unit is configured to:

generate the preceding detection result based on receiving the preceding data and to generate the repeat detection result for the repeat data based on the preceding detection result and a previous overall-decoding value;

calculate a decoding output corresponding to the preceding data; and

determine the previous overall-decoding value based on the decoding output for generating the repeat detection result.

9. The system as claimed in claim 1 wherein the control unit is configured to determine the communication content for a single-input single-output scheme, a multiple-input multiple-output scheme, or a combination thereof.

10. The system as claimed in claim 1 wherein the control unit is configured to determine the communication content using an iterative-detective-decoding scheme.

11. A method of operation of a requesting device in a communication system comprising:

receiving preceding data including a communication content corresponding to an instance of a transmission block;

transmitting a repeat request corresponding to an error detection status for the preceding data;

receiving a receiver signal corresponding to a further instance of the transmission block subsequent to the repeat request;

determining with a control unit a previous communication value resulting from decoding the preceding data for generating the error detection status of the preceding data;

identifying a repeat data corresponding to the repeat request from the receiver signal;

generating an accumulation output including systematic channel log-likelihood ratios (LLRs), subsequent to de-interleaving the receiver signal and de-puncturing the repeat data, based on combining the preceding data and the repeat data, and a repeat detection result and a preceding detection result; and

determining the communication content based on decoding the accumulation output using the previous communication value and the accumulation output.

12. The method as claimed in claim 11 wherein:

determining the previous communication value includes generating a previous inner-decoder value based on a further-decoder extrinsic value corresponding to the preceding data; and

determining the communication content includes determining a base-decoder a-priori value corresponding to the repeat data based on the previous inner-decoder value.

13. The method as claimed in claim 11 wherein:

determining the previous communication value includes;

calculating a decoding output corresponding to the preceding data, determining a previous overall-decoding value based on the decoding output; and

further comprising;

calculating a detector extrinsic value corresponding to the repeat data based on the previous overall-decoding value for determining the communication content by combining the preceding data and the repeat data.

14. The method as claimed in claim 11 wherein:

determining the previous communication value includes;

calculating a decoding output corresponding to the preceding data,

determining a previous overall-decoding value based on the decoding output; and

identifying the repeat data includes determining a detector output corresponding to the repeat data based on the previous overall-decoding value.

15. The method as claimed in claim 11 further comprising:

generating the preceding detection result based on receiving the preceding data;

wherein;

identifying the repeat data includes generating the repeat detection result corresponding to the repeat data;

generating the accumulation output includes;

generating a puncturing output based on the preceding detection result, and combining the puncturing output and the repeat detection result.

16. The method as claimed in claim 11 further comprising:

generating the preceding detection result based on receiving the preceding data; and

wherein;

identifying the repeat data includes generating the repeat detection result based on the preceding detection result.

17. The method as claimed in claim 11 further comprising:

generating the preceding detection result based on receiving the preceding data;

wherein;

determining the previous communication value includes;

calculating a decoding output corresponding to the preceding data,

determining a previous overall-decoding value based on the decoding output;

generating the accumulation output includes;

generating a puncturing output based on the preceding detection result and the previous overall-decoding value, and

combining the puncturing output and the repeat detection result.

18. The method as claimed in claim 11 further comprising:

generating the preceding detection result based on receiving the preceding data;

wherein;

determining the previous communication value includes;

calculating a decoding output corresponding to the preceding data,

determining a previous overall-decoding value based on the decoding output; and

identifying the repeat data includes generating the repeat detection result for the repeat data based on the preceding detection result and the previous overall-decoding value.

19. The method as claimed in claim 11 wherein determining the communication content includes determining the communication content for a single-input single-output scheme, a multiple-input multiple-output scheme, or a combination thereof.

20. The method as claimed in claim 11 wherein determining the communication content includes determining the communication content using an iterative-detective-decoding scheme.