Real-time DVB-S2 LDPC decoding on many-core GPU accelerators

Gabriel Falcao, Joao Andrade, Vitor Silva, Leonel Sousa
Instituto de Telecomunicacoes, Department of Electrical and Computer Engineering, University of Coimbra, P-3030-290, Portugal
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2011



   author={Falcao, G. and Andrade, J. and Silva, V. and Sousa, L.},

   booktitle={IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2011},



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It is well known that LDPC decoding is computationally demanding and one of the hardest signal operations to parallelize. Beyond data dependencies that restrict the decoding of a single word, it requires a large number of memory accesses. In this paper we propose parallel algorithms for performing in GPUs the most demanding case of irregular and long length LDPC codes adopted in the Digital Video Broadcasting – Satellite 2 (DVB-S2) standard used in data communications. By performing simultaneous multicodeword decoding and adopting special data structures, experimental results show that throughputs superior to 90 Mbps can be achieved when LDPC decoders for the DVB-S2 are implemented in the current GPUs.
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