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US 8,266,511 B2Granted
Decoding device and decoding method
AssigneeRenesas Electronics Corporation
InventorMasao Orio
Life of this patent
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Abstract
A decoding device includes a BM calculator calculating a branch metric in a Log-MAP algorithm from received data and extrinsic information, an ACS operator calculating a maximum value of a path metric based on the branch metric, a correction term calculator calculating a Jacobian correction value of the path metric, and a correction operator correcting the path metric by adjusting a value of the Jacobian correction value based on a size of the received data and adding the adjusted correction value to the maximum value.
Claims8
A decoding device, comprising:
- an Add Compare Select operator calculating two path metric values corresponding to received data to be decoded based on a branch metric value and outputting one of the path metric values and a path metric difference between the two path metric values;
- a correction term calculator coupled to the Add Compare Select operator to receive the path metric difference, to calculate and output a correction term based on the path metric difference and noise included in the received data, the correction term being adjusted based on a size of the received data which is not utilized for a calculation of a branch metric value;
- and
- a correction operator coupled to the correction term calculator and the Add Compare Select operator to receive the path metric value from the Add Compare Select operator, to receive the correction term adjusted based on the noise included in the received data from the correction term calculator, and to add the adjusted correction term to the path metric value.
1 more element
Dependencies are inferred from the claim text.