Resumo

FONTES PUPO, Ernesto; DIAZ HERNANDEZ, Reinier  e  ACOSTA CINTADO, Yoania. Non-Uniform Constellations in 1D for DTMB standard. EAC [online]. 2018, vol.39, n.1, pp. 62-72. ISSN 1815-5928.

The aim of this paper is to design 1-Dimensional Non-Uniform Constellation for DTMB standard and evaluate their performance improvements with regard to channel capacity. The use of such constellations offers a biggest spectral efficiency, reception at lower Signal to Noise Ratio and a Shannon limit gap reduction. Such constellations are designed based on the BICM optimization criterion. The DTMB system with the proposed constellations is validated by mean the analysis of BER, Capacity and Spectral Efficiency vs. Signal to Noise ratio. The results are always compared with the original standard. The simulations take into account the different available code rates of the standard, 6 MHz of bandwidth and AWGN channel model. The paper present the theoricals fundamentals of channel capacity, Uniform and Non-Uniform constellations and the description of the design algorithm. Moreover, the characteristics of the resulting constellations are shown.

Palavras-chave : 1D NUC; QAM; BICM capacity; channel capacity; Shannon limit; DTMB.

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