New stopping criterion for fast low-density parity-check decoders
Document Type
Article
Publication Date
10-1-2014
Abstract
Low-density parity-check (LDPC) codes are favorable in low bit-error-rate and high code-rate applications. However, the decoding complexity for LDPC codes is quite large, especially for nonbinary LDPC codes. In this paper, we propose a new T-tolerance stopping criterion for LDPC decoders by exploiting the fact that the total a posteriori probability (APP) should increase across iterations when message passing (MP) algorithms are employed. Simulation results demonstrate that our proposed new T-tolerance criterion can greatly reduce the average iteration number (complexity) while the decoding performance degradation is controlled within 0.1 dB in the low bit-energy-to-noise-spectral-density ratio (Eb/N0) scenarios.
Publication Source (Journal or Book title)
IEEE Communications Letters
First Page
1679
Last Page
1682
Recommended Citation
Xia, T., Wu, H., & Jiang, H. (2014). New stopping criterion for fast low-density parity-check decoders. IEEE Communications Letters, 18 (10), 1679-1682. https://doi.org/10.1109/LCOMM.2014.2349988