US 2021/0242884 A1 · LOW-DENSITY PARITY-CHECK DECODING WITH DE-SATURATION

Abstract

A saturation metric that represents a degree of saturation in a low-density parity-check (LDPC) decoding system that uses a fixed-point number representation is determined. The saturation metric is compared against a saturation threshold. In the event the saturation metric exceeds the saturation threshold, at the end of a decoding iteration, a message is more aggressively attenuated compared to when the saturation metric does not exceed the saturation threshold in order to produce an attenuated message. In the event the saturation metric does not exceed the saturation threshold, at the end of the decoding iteration, the message is less aggressively attenuated compared to when the saturation metric does exceed the saturation threshold in order to produce the attenuated message.

Claims20

Dependent claims

A decoder, comprising:

a saturation monitor configured to:
generate a global de-saturation control signal that is determined based at least in part on a saturation threshold and a degree of saturation in a low-density parity-check (LDPC) decoding system that uses a fixed-point number representation;
a plurality of variable nodes that is configured to:
in the event the global de-saturation control signal is a first value, output a more aggressively attenuated message to a plurality of check nodes compared to when the global de-saturation control signal is a second value;
and
in the event the global de-saturation control signal is the second value, output a less aggressively attenuated message to the plurality of check nodes compared to when the global de-saturation control signal is the first value;
and
the plurality of check nodes.

5 more elements

A computer program product embodied in a non-transitory computer readable medium and comprising computer instructions for:

generating a global de-saturation control signal that is determined based at least in part on a saturation threshold and a degree of saturation in a low-density parity-check (LDPC) decoding system that uses a fixed-point number representation;
in the event the global de-saturation control signal is a first value, outputting a more aggressively attenuated message to a plurality of check nodes compared to when the global de-saturation control signal is a second value;
and
in the event the global de-saturation control signal is the second value, outputting a less aggressively attenuated message to the plurality of check nodes compared to when the global de-saturation control signal is the first value.

1 more element

Dependencies are inferred from the claim text.

Low-density parity-check decoding with de-saturation

Life of this patent

Low-density parity-check decoding with de-saturation

Life of this patent

Abstract

Claims20