Multiple high-order APSK modulation schemes are added in the DVB-S2X standard on the basis of the DVB-S2 standard, and an 8+8APSK constellation is added based on the original 16APSK. In this paper, characteristics of a 16-APSK constellation are mainly analyzed, and a new soft demodulation optimization algorithm is proposed. Compared with the LLR algorithm and the Max-log-MAP algorithm, the proposed algorithm has the significantly reduced computational complexity. Simulation results of the three algorithms show that the optimization algorithm is small in performance loss and has good practicability in engineering application.
ZHANG Sha
,
JIANG Quanjiang
,
LIANG Guang
,
YU Jinpei
. A soft demodulation optimization algorithm of 16APSK signal for DVB-S2X standard[J]. Journal of University of Chinese Academy of Sciences, 2021
, 38(5)
: 660
-665
.
DOI: 10.7523/j.issn.2095-6134.2021.05.010
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