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US 2006/0242530 A1Published application
Method for constructing finite-length low density parity check codes
AssigneeNEC Laboratories America, Inc.
InventorsBen Lu, Guosen Yue, Xiaodong Wang, Mohammad Madihian
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Abstract
A technique for construction of finite-length low-density parity check (LDPC) codes is herein disclosed which advantageously provides a flexible tradeoff of low decoding thresholds and low error-floors.
Claims10
A method of generating a finite-length low-density parity check (LDPC) code comprising:
- (i) storing a parity check matrix, where bits in the parity check matrix are associated with nodes in a factor graph representation of the code;
- and
- (ii) adding bits to the stored parity check matrix subject to constraints which impose unequal protection for different types of cycles in the factor graph representation of the code, thereby resulting in an optimized code represented by the resulting parity check matrix.
Dependencies are inferred from the claim text.