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- W1588051003 abstract "We consider the compute-and-forward protocol design problem with the objective being maximizing the computation rate at a single relay, and propose an efficient method that finds the optimal solution based on sphere decoding. The problem can be transformed into a shortest vector problem (SVP), which can be solved in two steps. First, by fully exploiting the specific structure of the associated Gram matrix using the hyperbolic transformation, the Cholesky factor can be computed with only n2/2 + O(n) flops. Then, taking into account of some useful properties of the optimal solution, we modify the Schnorr-Euchner search algorithm to solve the SVP. Numerical results show that our proposed branch-and-bound method is much more efficient than the existing one that gives the optimal solution. Besides, compared with the suboptimal methods, our method offers the best performance at a cost lower than that of the LLL based method and similar to that of the quadratic programming relaxation method." @default.
- W1588051003 created "2016-06-24" @default.
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- W1588051003 date "2015-06-01" @default.
- W1588051003 modified "2023-10-16" @default.
- W1588051003 title "Compute-and-forward protocol design based on improved sphere decoding" @default.
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- W1588051003 doi "https://doi.org/10.1109/icc.2015.7248558" @default.
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