Bayes-Optimal Convolutional AMP
Bayes-Optimal Convolutional AMP
复制标题
贝叶斯-最优卷积 AMP
DOI:
10.1109/tit.2021.3077471
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发表时间:
2021
影响因子:
2.5
通讯作者:
Takeuchi Keigo
中科院分区:
文献类型:
--
作者:
Ken Tanizawa;and Fumio Futami;Takeuchi Keigo
This paper proposes Bayes-optimal convolutional approximate message-passing (CAMP) for signal recovery in compressed sensing. CAMP uses the same low-complexity matched filter (MF) for interference suppression as approximate message-passing (AMP). To improve the convergence property of AMP for ill-conditioned sensing matrices, the so-called Onsager correction term in AMP is replaced by a convolution of all preceding messages. The tap coefficients in the convolution are determined so as to realize asymptotic Gaussianity of estimation errors via state evolution (SE) under the assumption of orthogonally invariant sensing matrices. An SE equation is derived to optimize the sequence of denoisers in CAMP. The optimized CAMP is proved to be Bayes-optimal for all orthogonally invariant sensing matrices if the SE equation converges to a fixed-point and if the fixed-point is unique. For sensing matrices with low-to-moderate condition numbers, CAMP can achieve the same performance as high-complexity orthogonal/vector AMP that requires the linear minimum mean-square error (LMMSE) filter instead of the MF.
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DOI:
10.1109/isit.2016.7541382
发表时间:
2016
期刊:
2016 IEEE International Symposium on Information Theory (ISIT)
影响因子:
--
作者:
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通讯作者:
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2001
期刊:
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影响因子:
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DOI:
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发表时间:
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期刊:
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影响因子:
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作者:
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通讯作者:
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影响因子:
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通讯作者:
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DOI:
--
发表时间:
2019
期刊:
International Symposium on Information Theory
影响因子:
--
作者:
K. Takeuchi
通讯作者:
K. Takeuchi