Journal
IEICE ELECTRONICS EXPRESS
Volume 15, Issue 8, Pages -Publisher
IEICE-INST ELECTRONICS INFORMATION COMMUNICATION ENGINEERS
DOI: 10.1587/elex.15.20180195
Keywords
LDPC code; bit flipping algorithm; gradient descent algorithm; flipping times
Categories
Funding
- National Key RAMP
- D Program of China [2016YFA0202102]
- National Nature Science Foundation of China [61370040]
- project on the Industry key technologies of Jiangsu Province [BE2017153]
- Shenzhen science and technology project [JCYJ 20170818110714340]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Low-Density Parity-Check (LDPC) codes have capacity-approaching error-correction performance which makes them popular in communication system. Gradient descent bit flipping (GDBF) algorithms show an error correction capability superior to most known BF algorithms. In this paper, we propose an improved gradient descent bit flipping (IGDBF) algorithm for LDPC codes on BSC channel. Compared to GDBF algorithm, the proposed algorithm reconstructs the composition of energy function, and adds a penalty term to help it converge. Simulations show that the proposed algorithm has good performance and fast convergence rate.
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