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Low-Complexity Generalized Spatial Modulation Schemes Using Codebook-Assisted MIMO Detectors
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DOI：10.1109/TVT.2018.2871577.png)
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Abstract
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Generalized spatial modulation (GSM) is an attractive transmission technique formultiple-input multiple-output systems because of its spectral efficiency and energy efficiency. The maximum likelihood detector provides the optimal performance for GSM signal detection, but also leads to a high level of detection complexity. In this paper, both hard-decision and soft-decision detectors, which are based on a low-complexity codebookassisted tree-search algorithm, are investigated. In addition, outer lowdensity parity-check codes are designed such that the concatenated schemes are able to provide error performances, which are very close to those of the schemes using conventional detectors, but with a much lower level of computational complexity.
Keywords:
Generalized spatial modulation
massive MIMO
tree-search algorithm
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