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Non-uniform constellations (NUCs) have been introduced to improve the performance of quadrature amplitude modulation constellations. 1D-NUCs keep the squared shape, while 2D-NUCs break that constraint to provide robustness. An impending problem with multiple-input multiple-output (MIMO) is the optimum demapping complexity, which grows exponentially with the number of antennas and the constellation...
In this paper, we focus on the design of Non Uniform Constellations (NUC) in the context of Layered Division Multiplexing (LDM) proposed recently for digital television systems. Because the Physical Layer Pipe for which the Non Uniform Constellation is designed can be used with or without Layered Division Multiplexing, it is important to design a constellation optimized for the waterfall Signal to...
In this paper, we focus on the potential enhancements of the DVB-T2 signaling (L1Post) by the use of newly designed Two-Dimensional Non-Uniform Constellations (2D-NUC). We Base our design on the optimization of the Bit-interleaved Coded Modulation (BICM) capacity, the designed constellations provide a potential performance improvement of 0.55 dB for the overall DVB-T2 signaling performance in high...
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