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"This paper describes an effective arrival estimation algorithm for a hybrid millimeter wave communications device with 1-bit analog-to-digital/digital-to-analog converters built at transceivers. " Different signal-to-noise ratios and numbers of antennas can be estimated with numerical simulations, based on which, the best AoAs can be estimated with a small amount of overheads. ".
Source link: https://doi.org/10.3390/s22093140
"Polarization conversion metasurfaces are widely used in optical electronics, microwave devices, and communication systems due to their unique polarization modulation characteristics. However, in some situations, the unit cell must be capable of polarization conversion and phase modulation. We recommend a high-performing 1-bit reconfigurable coding metasurface with polarization conversion in this paper. Simultaneously, the metasurface achieves a phase difference of about 180% "by changing the working state of the PIN diodes. ".
Source link: https://doi.org/10.3389/fmats.2022.914937
"In frequency-division duplexing multiple-output devices, 1-bit compressed sensing based superimposed channel state feedback has shown many benefits, but the downlink CSI recovery has been plagued by poor quality and processing delays, among other difficulties. " The downlink CSI is reduced with the 1-bit CS technique, superimposed on the uplink user data sequences, and then sent back to the base station on the user side, but then sent back to the base station. A lightweight reconstruction scheme, which includes an initial feature extraction of the downlink CSI using the simplified traditional technique and a single hidden layer network, is used to reconstruct the downlink CSI with low processing time. The planned program, especially compared to the 1-bit CS-based superimposed CSI feedback scheme, improves the UL-US and downlink CSI's recovery rates, which has reduced processing time and robustness against parameter variations. ".
Source link: https://doi.org/10.1371/journal.pone.0265109
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