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Equivalent MIMO Channel Matrix Sparsification for Enhancement of Sensor Capabilities
Mikhail Bakulin1, Vitaly Kreyndelin1, Sergei Melnik1
1Faculty of Radio and Television, Moscow Technical University of Communications and Informatics (MTUCI), 111024 Moscow, Russia.
Abstract:
One of the development directions of new-generation mobile communications is using multiple-input multiple-output (MIMO) channels with a large number of antennas. This requires the development and utilization of new approaches to signal detection in MIMO channels, since the difference in the energy efficiency and the complexity between the optimal maximum likelihood algorithm and simpler linear algorithms become very large. The goal of the presented study is the development of a method for transforming a MIMO channel into a model based on a sparse matrix with a limited number of non-zero elements in a row. It was shown that the MIMO channel can be represented in the form of a Markov process. Hence, it becomes possible to use simple iterative MIMO demodulation algorithms such as message-passing algorithms (MPAs) and Turbo.
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