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Implementation and Performance Analysis of DVB-T2 Rotated Constellation Demappers on a GPU

Stefan Grönroos, Kristian Nybom, Jerker Björkqvist, Implementation and Performance Analysis of DVB-T2 Rotated Constellation Demappers on a GPU. Analog Integrated Circuits and Signal Processing 78(3), 589–598, 2014.

http://dx.doi.org/10.1007/s10470-013-0101-3

Abstract:

The DVB-T2 standard for digital terrestrial broadcasting supports the use of quadrature amplitude modulation constellations where the constellation points are rotated in the I–Q plane. This combined with a cyclic delay of the Q component provides improved performance in some fading channels. The complexity of the optimal demapping process for rotated constellations is however significantly higher than for non-rotated constellations. This makes the DVB-T2 demapper one of the most computationally complex parts of a receiver. In this article, we examine possible simplifications of the demapping process suitable for implementation on a general purpose computer containing a modern graphics processing unit (GPU). Furthermore, we measure the performance in terms of throughput, as well as accuracy, of the implemented algorithms. The implementations are designed to interface efficiently to a previously implemented real-time capable GPU-based low-density parity-check channel decoder.

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BibTeX entry:

@ARTICLE{jGrNyBj14a,
  title = {Implementation and Performance Analysis of DVB-T2 Rotated Constellation Demappers on a GPU},
  author = {Grönroos, Stefan and Nybom, Kristian and Björkqvist, Jerker},
  journal = {Analog Integrated Circuits and Signal Processing},
  volume = {78},
  number = {3},
  publisher = {Springer US},
  pages = {589–598},
  year = {2014},
  keywords = {DVB-T2, Demapper, CUDA, SDR},
}

Belongs to TUCS Research Unit(s): Embedded Systems Laboratory (ESLAB), Software Engineering Laboratory (SE Lab)

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