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An Approximate Message Passing Framework for Side Information. (arXiv:1807.04839v1 [cs.IT])
来源于:arXiv
Approximate message passing (AMP) methods have gained recent traction in
sparse signal recovery. Additional information about the signal, or side
information (SI), is commonly available and can aid in efficient signal
recovery. In this work, we present an AMP-based framework that exploits SI and
can be readily implemented in various settings. To illustrate the simplicity
and wide applicability of our approach, we apply this framework to a
Bernoulli-Gaussian (BG) model and a time-varying birth- death-drift (BDD)
signal model, motivated by applications in channel estimation. We develop a
suite of algorithms, called AMP-SI, and derive denoisers for the BDD and BG
models. We also present numerical evidence demonstrating the advantages of our
approach, and empirical evidence of the accuracy of a proposed state evolution. 查看全文>>