A multilevel coded modulation approach for hexagonal signal constellation

Authors:
Makoto Tanahashi;Hideki Ochiai
Affiliations:
Department of Electrical and Computer Engineering, Yokohama National University, Yokohama, Kanagawa, Japan;Department of Electrical and Computer Engineering, Yokohama National University, Yokohama, Kanagawa, Japan
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

Citing 3
Cited 0

On the Use of Hexagonal Constellation for Peak-to-Average Power Ratio Reduction of an ODFM Signal

IEEE Transactions on Wireless Communications
Serial concatenation of interleaved codes: performance analysis, design, and iterative decoding

IEEE Transactions on Information Theory
Multilevel codes: theoretical concepts and practical design rules

IEEE Transactions on Information Theory

Quantified Score

Hi-index	0.01

Visualization

Abstract

We propose a new coded modulation called hexagonal shell modulation (HSM). The HSM has a signal constellation composed of shell-like tiling of hexagons and thus has a lower peak-to-average power ratio (PAR) than a standard square quadrature amplitude modulation (QAM) with comparable bandwidth efficiency and minimum Euclidean distance. The main challenge is that HSM has a non-power-of-two number of constellation points, and thus assignment of binary information to HSM is not straightforward. We resolve this by applying a multilevel coded modulation (MLC) scheme where a ternary set partitioning combined with binary-input ternary-output (BITO) turbo codes is employed to fully exploit the property of the nonpower-of-two constellation points. Throughout this letter, we focus on an 18-ary HSM with the information rate of 3 bit/symbol as a specific example. It is shown that this system outperforms the standard square 16-QAM with the same rate when PAR is constrained.