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Iterative decoding of blocks with cyclic redundancy checks

A technology of cyclic redundancy check and iterative decoding, which is applied in the direction of error correction/error detection, code conversion, encoding, etc. by combining multiple code structures, can solve the level battery that is not effectively solved, the stop rule is complicated, and the complexity Increased power consumption and other issues, to achieve the effect of fast operation, small chip area and power consumption, and reduce complexity

Active Publication Date: 2014-11-05
OPTIS CELLULAR TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As decoding resources increase, especially for mobile devices, so does the level of complexity and battery drain
Existing stopping rules do not effectively address these issues due to their complexity

Method used

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  • Iterative decoding of blocks with cyclic redundancy checks
  • Iterative decoding of blocks with cyclic redundancy checks
  • Iterative decoding of blocks with cyclic redundancy checks

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0054] As described herein above, there can be "miss events" and "false alarm events" caused by early stopping rules with iterative decoding. It is best to keep the probability of "miss events" and "false alarm events" as low as feasible in designing early stopping rules. The "miss event" probability exists in all three types of stopping rules: hard and soft decision rules and CRC rules. However, the CRC rule has the unique advantage of exhibiting essentially zero "false alarm event" probability.

[0055] It should be noted that, given the CRC attachment to a block, there are numerous ways to design different stopping rules with different reliability levels. A naive approach may get a floor on the code block error probability, which is ultimately undesirable. This is further exacerbated when the transport block is divided into sub-blocks and the iterative decoding of the stop rule applied to each sub-block. A focus of certain described embodiments is to avoid such outcomes....

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Abstract

The iterative decoding of blocks may be continued or terminated based on CRC checks. In an example embodiment, one iteration of an iterative decoding process is performed on a block whose information bits are covered by a CRC. The iterative decoding process is stopped if the CRC checks for a predetermined number of consecutive iterations. In another example embodiment, a decoding iteration is performed on a particular sub-block of multiple sub-blocks of a transport block, which includes a single CRC over an entirety of the transport block. The CRC is checked using decoded bits obtained from the decoding iteration on the particular sub-block and decoded bits obtained from previous decoding iterations on other sub-blocks of the multiple sub-blocks. The decoding iteration is then performed on a different sub-block if the CRC does not check. Also, the decoding iterations for the sub-blocks may be terminated if the CRC checks.

Description

[0001] Cross References to Related Applications [0002] This non-provisional US patent application claims priority to US Provisional Patent Application No. 60 / 973500, filed September 19, 2007, entitled "Method and Arrangement in a Telecommunication System." US Provisional Patent Application No. 60 / 973500 is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to communication systems and, in particular, to complexity reduction for iterative decoders using CRC checks. Background technique [0004] There are many terminology and acronyms used in the communications technology field. At least some of the following terms and acronyms are referred to in the text that follows, such as in the Background and / or Description sections. Accordingly, the following terms and acronyms are defined here: [0005] 3GPP Third Generation Partnership Project [0006] CRC Cyclic Redundancy Check [0007] E-UTRAN Evolution UTRAN ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH03M13/093H03M13/09H04L1/0051H04L1/18H03M13/6525H04L1/0061H04L1/0083H03M13/2975H03M13/00H03M13/29H04L1/00H03M13/3753H03M13/2948H03M13/2951
Inventor R·拉梅什H·库拉帕蒂郑荣富K·巴拉钱德兰
Owner OPTIS CELLULAR TECH LLC