Simplified Soft Demapping Algorithm for Gray-APSK

Jiachen HUANG; Changyong PAN; Kewu PENG; Liwen FAN; Jian SONG

doi:10.1587/transcom.E96.B.1814

IEICE Transactions on Communications

Online ISSN : 1745-1345
Print ISSN : 0916-8516

Regular Section

Simplified Soft Demapping Algorithm for Gray-APSK

Jiachen HUANG, Changyong PAN, Kewu PENG, Liwen FAN, Jian SONG

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Keywords: Gray-APSK, soft demapping, simplified algorithm

JOURNAL RESTRICTED ACCESS

2013 Volume E96.B Issue 7 Pages 1814-1818

DOI https://doi.org/10.1587/transcom.E96.B.1814

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Abstract

Amplitude phase shift keying (APSK) constellation with Gray mapping was proposed recently. Inspired by the simplified soft demapping for regular Gray-QAM, a simplified soft demapping algorithm for Gray-APSK is proposed in this paper. Compared with conventional soft demapping schemes, its complexity is greatly reduced with only a little SNR loss, which is validated by the complexity analysis and FPGA compilation results.

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