Map decoder having low latency and operation method of the same
AssigneeElectronics and Telecommunications Research Institute
InventorsYong Ho LEE, Deock Gil OH
Life of this patent
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Abstract
Provided is a maximum a posteriori (MAP) decoder having a low latency and an operation method of the MAP decoder, including a branch metric calculation block to calculate a branch metric based on a received signal, a processor control block to demultiplex a received signal in a certain trellis section, an Extrinsec vector, and the calculated branch metric value, and a processor to calculate a path metric entering each state node in a certain trellis section, compensate for the calculated path metric, and calculate a state metric to be applied to a next trellis section based on the compensated path metric.
Claims13
A maximum a posteriori (MAP) decoder, comprising:
- a branch metric calculation block to calculate a branch metric based on a received signal;
- a processor control block to demultiplex a received signal in a certain trellis section, an Extrinsec vector, and a value of the calculated branch metric;
- and
- a processor to calculate a path metric entering each state node in the certain trellis section based on an arbitrary recursive calculation, compensate for the calculated path metric, and calculate a state metric to be applied to a next trellis section based on the compensated the path metric.
An operation method of a maximum a posteriori (MAP) decoder, the method comprising:
- calculating, by a branch metric calculation block, a branch metric based on a received signal;
- demultiplexing, by a processor control block, a received signal in a certain trellis section, an Extrinsec vector, and the calculated branch metric;
- calculating, by a processor, a path metric entering each state node in the certain trellis section based on an arbitrary recursive calculation;
- compensating, by the processor, for the calculated path metric;
- and
- calculating, by the processor, a state metric to be applied to a next trellis section, based on the compensated path metric.
Dependencies are inferred from the claim text.