US 11,811,425 B2
Neural network soft information detector in a read channel
Iouri Oboukhov, Rochester, MN (US); Daniel Bedau, San Jose, CA (US); Richard Galbraith, Rochester, MN (US); Niranjay Ravindran, Rochester, MN (US); Weldon Hanson, Rochester, MN (US); and Pradhan Bellam, Rochester, MN (US)
Assigned to Western Digital Technologies, Inc., San Jose, CA (US)
Filed by Western Digital Technologies, Inc., San Jose, CA (US)
Filed on Sep. 21, 2021, as Appl. No. 17/480,301.
Claims priority of provisional application 63/189,883, filed on May 18, 2021.
Prior Publication US 2022/0376711 A1, Nov. 24, 2022
Int. Cl. H03M 13/41 (2006.01); H03M 13/37 (2006.01); H04L 1/00 (2006.01); G06N 3/04 (2023.01); G06N 7/01 (2023.01)
CPC H03M 13/4138 (2013.01) [H03M 13/3746 (2013.01); G06N 3/04 (2013.01); G06N 7/01 (2023.01); H04L 1/005 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A read channel circuit, comprising:
a neural network detector configured to:
receive a data symbol, wherein the data symbol includes a plurality of unknown bits;
determine a set of probabilities for possible states of the data symbol; and
output the set of probabilities for possible states of the data symbol;
a soft output detector configured to:
receive the set of probabilities for possible states of the data symbol to populate a decision matrix; and
output, based on the decision matrix, a set of bit probabilities for bits of a data unit that includes the data symbol; and
an iterative decoder configured to:
iteratively calculate, based on feedback of soft information, bit values based on the set of bit probabilities for the bits of the data unit; and
output decoded bit values for the data unit that includes the data symbol.