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In this study, a spectral efficient channel recovery scheme is proposed for spatial-temporal correlated sparse massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing systems. By exploiting the spatial-temporal correlations of massive MIMO channels, superimposed time-frequency training sequences (TSs) are jointly utilised for accurate channel state information (CSI)...
Recently, some orthogonal multiple access schemes are utilized in return channels. However, in the field of wireless communication, as the number of users increases, the orthogonal resources are difficult to meet the explosive demand of access. For this reason, some non-orthogonal multiple access (NOMA) schemes have been proposed to solve the key problem of massive connectivity. In this paper, we...
Recently, compressive sensing (CS) methods have been considered to improve the accuracy of channel estimation. Since the accurate estimation of the channel relies on the size of the observations, the fixed size of the observations is usually the trade-off between the channel estimation accuracy and the length of the channel delay to handle. In this paper, an adaptive compressive sensing (A-CS) algorithm...
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