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APSK Constellation with Gray Mapping
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DOI：10.1109/LCOMM.2011.101211.111825.png)
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Amplitude phase shift keying (APSK) constellation is superior to its quadrature amplitude modulation (QAM) counterpart from the mutual information point of view. However, due to the lack of Gray mapping, it introduces high independent demapping loss. In this letter, a special kind of APSK constellations with Gray mapping (Gray-APSK) is proposed, which provides considerable shaping gain compared with the QAM constellations with Gray mapping (Gray-QAM) in both independent and iterative demapping scenarios, as verified by average mutual information analysis and bit error rate simulations.
Keyword:
APSK
Gray mapping
shaping gain
期刊
IF:
4.4
论文数:
1.3W
被引数:
2.2W
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