Success probability of the L_0-regularized box-constrained Babai point and column permutation strategies
CoRR(2024)
摘要
We consider the success probability of the L_0-regularized box-constrained
Babai point, which is a suboptimal solution to the L_0-regularized
box-constrained integer least squares problem and can be used for MIMO
detection. First, we derive formulas for the success probability of both
L_0-regularized and unregularized box-constrained Babai points. Then we
investigate the properties of the L_0-regularized box-constrained Babai
point, including the optimality of the regularization parameter, the
monotonicity of its success probability, and the monotonicity of the ratio of
the two success probabilities. A bound on the success probability of the
L_0-regularized Babai point is derived. After that, we analyze the effect of
the LLL-P permutation strategy on the success probability of the
L_0-regularized Babai point. Then we propose some success probability based
column permutation strategies to increase the success probability of the
L_0-regularized box-constrained Babai point. Finally, we present numerical
tests to confirm our theoretical results and to show the advantage of the L_0
regularization and the effectiveness of the proposed column permutation
algorithms compared to existing strategies.
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