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A Worst Case Performance Optimization Based Design Approach to Robust Symbol Level Precoding for Downlink MU MIMO

Abstract: 

This paper addresses the optimization problem of symbol-level precoding (SLP) in the downlink of a multiuser multiple-input multiple-output (MU-MIMO) wireless system while the precoder’s output is subject to partially-known distortions. In particular, we assume a linear distortion model with bounded additive noise. The original signal-to-interference-plus-noise ratio (SINR) -constrained SLP problem minimizing the total transmit power is first reformulated as a penalized unconstrained problem, which is referred to as the relaxed robust formulation. We
then adopt a worst-case design approach to protect the users’ intended symbols and the targeted constructive interference with a desired level of confidence. Due to the non-convexity of the relaxed robust formulation,
we propose an iterative algorithm based on the block coordinate ascent-descent method. We show through simulation results that the proposed robust design is flexible in the sense that the CI constraints can be relaxed so as to keep a desirable balance between achievable rate and power consumption. Remarkably, the new formulation yields more energy-efficient solutions for appropriate choices of the penalty parameter, compared to the original SLP problem.

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Paper Details

Authors:
Shahram Shahbazpanahi, Bjorn Ottersten
Submitted On:
18 November 2019 - 1:04pm
Short Link:
Type:
Presentation Slides
Event:
Presenter's Name:
Alireza Haqiqatnejad
Paper Code:
1570589488
Document Year:
2019
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Document Files

WCSLP_GSIP.pdf

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[1] Shahram Shahbazpanahi, Bjorn Ottersten, "A Worst Case Performance Optimization Based Design Approach to Robust Symbol Level Precoding for Downlink MU MIMO", IEEE SigPort, 2019. [Online]. Available: http://sigport.org/4960. Accessed: Dec. 12, 2019.
@article{4960-19,
url = {http://sigport.org/4960},
author = {Shahram Shahbazpanahi; Bjorn Ottersten },
publisher = {IEEE SigPort},
title = {A Worst Case Performance Optimization Based Design Approach to Robust Symbol Level Precoding for Downlink MU MIMO},
year = {2019} }
TY - EJOUR
T1 - A Worst Case Performance Optimization Based Design Approach to Robust Symbol Level Precoding for Downlink MU MIMO
AU - Shahram Shahbazpanahi; Bjorn Ottersten
PY - 2019
PB - IEEE SigPort
UR - http://sigport.org/4960
ER -
Shahram Shahbazpanahi, Bjorn Ottersten. (2019). A Worst Case Performance Optimization Based Design Approach to Robust Symbol Level Precoding for Downlink MU MIMO. IEEE SigPort. http://sigport.org/4960
Shahram Shahbazpanahi, Bjorn Ottersten, 2019. A Worst Case Performance Optimization Based Design Approach to Robust Symbol Level Precoding for Downlink MU MIMO. Available at: http://sigport.org/4960.
Shahram Shahbazpanahi, Bjorn Ottersten. (2019). "A Worst Case Performance Optimization Based Design Approach to Robust Symbol Level Precoding for Downlink MU MIMO." Web.
1. Shahram Shahbazpanahi, Bjorn Ottersten. A Worst Case Performance Optimization Based Design Approach to Robust Symbol Level Precoding for Downlink MU MIMO [Internet]. IEEE SigPort; 2019. Available from : http://sigport.org/4960