A new ordering for efficient sphere decoding

  title={A new ordering for efficient sphere decoding},
  author={Karen Su and Ian J. Wassell},
  journal={IEEE International Conference on Communications, 2005. ICC 2005. 2005},
  pages={1906-1910 Vol. 3}
This paper presents a novel pre-processing stage that offers significant improvement in the computational efficiency of sphere decoding by imposing a geometrically-inspired ordering on the columns of the channel matrix. By studying the performance of a genie decoder, which has knowledge of the optimal radius, we find that the optimal ordering depends not only on the channel matrix, but also on the received point. Analysis of this idealized problem leads to the proposal of an enhanced ordering… CONTINUE READING
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