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- W1614925393 abstract "We consider the problem of estimating an input signal from noisy measurements in both parallel scalar Gaussian channels and linear mixing systems. The performance of the estimation process is quantified by the $ell_infty$ norm error metric. We first study the minimum mean $ell_infty$ error estimator in parallel scalar Gaussian channels, and verify that, when the input is independent and identically distributed (i.i.d.) mixture Gaussian, the Wiener filter is asymptotically optimal with probability 1. For linear mixing systems with i.i.d. sparse Gaussian or mixture Gaussian inputs, under the assumption that the relaxed belief propagation (BP) algorithm matches Tanaka's fixed point equation, applying the Wiener filter to the output of relaxed BP is also asymptotically optimal with probability 1. However, in order to solve the practical problem where the signal dimension is finite, we apply an estimation algorithm that has been proposed in our previous work, and illustrate that an $ell_infty$ error minimizer can be approximated by an $ell_p$ error minimizer provided the value of $p$ is properly chosen." @default.
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- W1614925393 date "2013-04-22" @default.
- W1614925393 modified "2023-09-27" @default.
- W1614925393 title "Mixture Gaussian Signal Estimation with L_infty Error Metric" @default.
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