Abstract
In this paper, we propose a novel multiuser generalized spatial modulation (GSM) detection scheme for uplink massive MIMO systems. In GSM, the indices of the active antennas of each user terminal are used to convey information in addition to the transmitted symbols. Hence, a two-stage detection structure is developed consisting of preprocessing (identification) and postprocessing (detection). At the receiver front end, we propose an eigenvalue decomposition-based active antennas identification algorithm to decode the first part of data. Based on the acquired channel state information, a least-square-based decorrelating detector is developed to extract the second part of data symbol. The system capacity (transmitted bits per channel use) is extensively increased compared to the conventional spatial modulation scheme, and the complexity is significantly reduced than existing algorithms. Computer simulations demonstrate that the proposed algorithm is near-far resistant and works reliably for small window size, which is essential for the low-latency requirement in 5G and future networks.
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Wu, WC. EVD-Based Multiuser Detection in Uplink Generalized Spatial Modulation MIMO Systems. Arab J Sci Eng 47, 13811–13821 (2022). https://doi.org/10.1007/s13369-021-06483-w
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DOI: https://doi.org/10.1007/s13369-021-06483-w