Efficient LLR-Domain Decoding of ABS+ Polar Codes
This work offers an efficiency improvement for decoding ABS+ polar codes, which are a generalization of Arikan polar codes, but the gains are incremental and specific to the high-SNR regime.
The authors present an LLR-domain SCL decoder for ABS+ polar codes and optimize it to reduce complexity, achieving the same frame error rate as classical polar codes with fewer arithmetic operations in the high-SNR region.
ABS+ polar codes are a generalization of Arikan polar codes that provides much faster polarization. We present an LLR-domain version of the SCL decoder of ABS+ polar codes. Furthermore, we optimize the SCL algorithm in order to reduce the complexity of LLR computation. In comparison with classical polar codes, the proposed approach requires less number of arithmetic operations in the SCL decoder to obtain the same frame error rate (FER) at high-SNR region.