Generalized low-density parity check codes (GLDPC)

Abstract

Provided is an encoder, a decoder, a computer-readable medium and methods of forward error correction channel encoding / decoding within a HARQ scheme, based on a generalized quasi-cyclic low-density parity-check code comprising a Cordaro-Wagner component code.

Description

technical field [0001] The present disclosure relates to generalized low-density parity-check (GLDPC) codes for channel coding in digital communication systems. Specifically, the present disclosure relates to GLDPC codes of an incremental redundancy hybrid automatic repeat request (IR-HARQ) scheme. Background technique [0002] figure 1 is a block diagram of a general digital communication system 10 in which elements of the present disclosure are implemented. The system includes a transmitting side comprising a generic encoder 12 and a receiving side comprising a generic decoder 14 . The input value of the universal encoder 12 at the sending side can be the k-bit information sequence IS 1 , where in the encoding operation performed by the general encoder 12, a redundant sequence of r bits is added to the information sequence IS 1 , resulting in an encoded information sequence IS of k+r=n bits that can be forwarded to the modulator 16 2 . [0003] Modulator 16 can conve...

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Problems solved by technology

Correspondingly, when an error occurs in the a variable nodes, only the b check nodes cannot be satisfied because the belief propagation algorithm used in the decoder 14 can be "trapped" in the minimum value of the error, resulting in a high error floor

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