Non-Uniform Constellations for ATSC 3.0

作者：Loghin Nabil Sven^*; Zoellner Jan; Mouhouche Belkacem; Ansorregui Daniel; Kim Jinwoo; Park Sung Ik

来源：IEEE Transactions on Broadcasting, 2016, 62(1): 197-203.

DOI：10.1109/TBC.2016.2518620

• Non-uniform constellations
• constellation shaping
• QAM
• ATSC3.0
• terrestrial broadcast

This paper introduces the concept of a non-uniform constellation (NUC) in contrast to conventional uniform quadrature-amplitude modulation (QAM) constellations. Such constellations provide additional shaping gain, which allows reception at lower signal-to-noise ratios. ATSC3.0 will be the first major broadcasting standard, which completely uses NUCs due to their outstanding properties. We will consider different kinds of NUCs and describe their performance: 2-D NUCs provide more shaping gain at the cost of higher demapping complexity, while 1-D NUCs allow low-complexity demapping at slightly lower shaping gains. These NUCs are well suited for very large constellations sizes, such as 1k and 4k QAM.

• 出版日期2016-3