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Large MIMO Systems by B. Sundar Rajan, A. Chockalingam

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7  Detection/decoding based on message passing on graphical models

Probability theory and graph theory are two branches of mathematics that are widely applicable in many different domains. Graphical models combine concepts from both these branches to provide a structured framework that supports representation, inference, and learning for a broad spectrum of problems [1]. Graphical models are graphs that indicate inter-dependencies between random variables [2],[3]. Distributions that exhibit some structure can generally be represented naturally and compactly using a graphical model, even when the explicit representation of the joint distribution is very large. The structure often allows the distribution to be used effectively for inference, i.e., ...

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