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Simplified Soft Demapping Algorithm for Gray-APSK
Jiachen HUANG Changyong PAN Kewu PENG Liwen FAN Jian SONG
IEICE TRANSACTIONS on Communications
Publication Date: 2013/07/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Transmission Systems and Transmission Equipment for Communications
Gray-APSK, soft demapping, simplified algorithm,
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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.