APSK Constellation with Gray Mapping

Author

Liu, Zaishuang ; Xie, Qiuliang ; Peng, Kewu ; Yang, Zhixing

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

Volume

15

Issue

12

fYear

2011

fDate

12/1/2011 12:00:00 AM

Firstpage

1271

Lastpage

1273

Abstract

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.

Keywords

phase measurement; phase shift keying; quadrature amplitude modulation; APSK constellation; Gray mapping; Gray-APSK; QAM counterpart; amplitude phase shift keying; average mutual information analysis; bit error rate simulations; high independent demapping loss; iterative demapping; quadrature amplitude modulation; Bit error rate; Digital video broadcasting; Quadrature amplitude modulation; Simulation; Turbo codes; APSK; Gray mapping; shaping gain;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2011.101211.111825

Filename

6064854