Reference : PowerMinimizer Symbol-Level Precoding: A Closed-Form Sub-Optimal Solution
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
Security, Reliability and Trust
http://hdl.handle.net/10993/36870
PowerMinimizer Symbol-Level Precoding: A Closed-Form Sub-Optimal Solution
English
Haqiqatnejad, Alireza mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Kayhan, Farbod mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Nov-2018
IEEE Signal Processing Letters
Institute of Electrical and Electronics Engineers
25
11
1730-1734
Yes (verified by ORBilu)
International
1070-9908
United States
[en] Constructive interference ; Downlink multiuser MISO ; Power minimization ; Symbol-level precoding
[en] In this letter, we study the optimal solution of multiuser symbol-level precoding (SLP) for minimization of the total transmit power under given signal-to-interference-plus noise ratio (SINR) constraints. Adopting the distance preserving constructive interference regions (DPCIR), we first derive a simplified reformulation of the problem. Then, we analyze the structure of the optimal solution using the Karush-Kuhn-Tucker (KKT) optimality conditions. This leads us to obtain a closed-form sub-optimal SLP solution (CF-SLP) for the original problem. Meanwhile, we obtain the necessary and sufficient condition under which the power minimizer SLP is equivalent to the conventional zero-forcing beamforming (ZFBF). Simulation results show that CF-SLP provides significant gains over ZFBF, while performing quite close to the optimal SLP in scenarios with rather small number of users. The results further indicate that the CF-SLP method has a reduction of order 1000 in computational time compared to the optimal solution.
Interdisciplinary Centre for Security, Reliability and Trust (SnT) > SIGCOM
Fonds National de la Recherche - FnR
Researchers ; Professionals ; Students
http://hdl.handle.net/10993/36870
10.1109/LSP.2018.2870518
https://ieeexplore.ieee.org/document/8465957
FnR ; FNR11332341 > Farbod Kayhan > ESSTIMS > Enhanced Signal Space opTImization for satellite comMunication Systems > 01/12/2016 > 31/01/2020 > 2016

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