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http://dx.doi.org/10.6109/jkiice.2016.20.4.715

Design of 3-Dimensional Cross-Lattice Signal Constellations with Increased Compactness  

Li, Shuang (Department of Electrical and Electronic Engineering, Gyeongsang National University)
Kang, Seog Geun (Department of Semiconductor Engineering, Gyeongsang National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.20, no.4, 2016 , pp. 715-720 More about this Journal
Abstract
In this paper, a method to design 3-dimensional (3-D) cross-lattice signal constellations with increased compactness is presented and analyzed. Here, the symbols located at the outermost sides in the conventional lattice constellation are moved symmetrically to fill in empty sides and sunken corners. While the minimum Euclidean distance (MED) among adjacent symbols remains unchanged, the presented cross-lattice constellations have 3~5% reduced average power and upto 25% reduced total volume as compared with the conventional ones. Due to the increase compactness, average power of the new 3-D constellations is lower than that of the conventional ones. As a result, computer simulation verifies that the presented cross-lattice constellations can improve symbol error performance of a digital transmission system about 0.4 [dB]. Hence, the proposed 3-D cross-lattice constellations are appropriate for low-power and high-quality digital communication systems.
Keywords
Digital communications; Lattice; Minimum Euclidean distance; Shaping gain; Signal constellation;
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