In this paper, we focus on how to further enhance the performance of the channel codes in order to meet the more stringent reliability requirements of future networks (5G and beyond). A general decoder with the aid of partial cyclic redundancy check (CRC) bits is proposed for the polar codes and short low-density parity-check (LDPC) codes in 5G systems. The decoder based on ordered statistic decoding (OSD) method can effectively improve the error-correction performance on the condition that extra CRC bits are used to assist in decoding. Meanwhile, the remaining part of CRC keeps its capability of error-detection to guarantee the undetected error rate low enough. This paper gives the detailed implementation schemes of the partial CRC-aided OSD process and its combination with the conventional decodings of the LDPC/polar codes in 5G systems. The simulation results show our proposed decoding scheme achieves a promising trade-off between the performance gain and the error-detection capabilities.
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This work was supported in part by National Natural Science Foundation of China (Grant No. 61771133) and in part by National Science & Technology Projects of China (Grant No. 2018ZX03001002).
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Jiang, M., Li, Z., Yang, X. et al. Partial CRC-aided decoding of 5G-NR short codes using reliability information. Sci. China Inf. Sci. 62, 80303 (2019). https://doi.org/10.1007/s11432-019-9905-7
- polar codes
- LDPC codes
- CRC codes
- successive cancellation list decoding
- ordered statistic decoding