Low-complexity de-mapping algorithms for 64-APSK signals
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- 所属单位：电子信息工程学院
- 发表刊物：ETRI JOURNAL
- 关键字：64-APSK de-mapping DVB-S2 log likelihood ratio log-MAP low complexity max-log approximation (Max-Log-MAP)
- 摘要：Due to its high spectrum efficiency, 64-amplitude phase-shift keying (64-APSK) is one of the primary technologies used in deep space communications and digital video broadcasting through satellite-second generation. However, 64-APSK suffers from considerable computational complexity because of the de-mapping method that it employs. In this study, a low-complexity de-mapping method for (4 + 12 + 20 + 28) 64-APSK is proposed in which we take full advantage of the symmetric characteristics of each symbol mapping. Moreover, we map the detected symbol to the first quadrant and then divide the region in this first quadrant into several partitions to simplify the formula. Theoretical analysis shows that the proposed method requires no operation of exponents and logarithms and involves only multiplication, addition, subtraction, and judgment. Simulation results validate that the time consumption is dramatically decreased with limited degradation of bit error rate performance.
- ISSN号：1225-6463
- 是否译文：否
- 发表时间：2019-06-01
- 合写作者：徐大专,张小飞,Luo, Hao
- 通讯作者：鲍军委
- 发表时间：2019-06-01
