Mojahedian, Mohammad MahdiLozano Solsona, Angel2024-03-192024-03-192023Mojahedian MM, Lozano A. Precoding and reception for ULA-based wide-aperture MIMO. IEEE Wirel Commun Lett. 2023;12(4):654-8. DOI: 10.1109/LWC.2023.32380372162-2337http://hdl.handle.net/10230/59489An approach is presented to compute the capacity-achieving precoder and receiver for wide-aperture MIMO with uniform linear arrays in O(N2min) operations as opposed to the O(N2minNmax) required by the singular-value decomposition of the channel matrix; Nmin and Nmax are the smallest and largest of the numbers of transmit and receive antennas. This hefty reduction in complexity comes at no cost in performance provided a parabolic wavefront model applies over the arrays, which is the case if the array apertures are not overly large relative to the range. Then, as the number of antennas grows larger, the proposed approach evolves into DFT-based precoders and receivers that are even more easily computable.application/pdfeng© 2023 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. http://dx.doi.org/10.1109/LWC.2023.3238037info:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/LWC.2023.3238037Receiving antennasMIMO communicationPrecodingLinear antenna arraysTransmitting antennasSignal to noise ratioMatrix decompositioninfo:eu-repo/semantics/openAccess