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- W3100677532 abstract "We study the performance of linear zero-forcing (ZF) precoding in multiuser multiple-input single-output visible light communications (VLC) when we are able to select the receiving orientation angle (ROA) of each user. For radio-frequency communications, the non-line-of-sight rich scattering environment usually ensures the linear independence among user's channels. However, this condition is less likely to happen in VLC systems, degrading the performance of ZF precoding. In this work, we propose a variable ROA (vROA) photodetector able to modify its orientation vector in order to generate semi-orthogonal channel responses among users. We derive the algorithm for determining the orientation of the vROA photodetector of each user, obtaining optimal and suboptimal solutions with high and low complexity, respectively. Simulation results show that the performance of ZF precoding is improved considerably by managing the users ROA." @default.
- W3100677532 created "2020-11-23" @default.
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- W3100677532 date "2021-03-01" @default.
- W3100677532 modified "2023-09-23" @default.
- W3100677532 title "Optimization of the Receiving Orientation Angle for Zero-Forcing Precoding in VLC" @default.
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- W3100677532 doi "https://doi.org/10.1109/lcomm.2020.3038027" @default.
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