---
_id: '53282'
abstract:
- lang: eng
  text: "Modern wireless communication systems are expected to provide improved\r\nlatency
    and reliability. To meet these expectations, a short packet length is\r\nneeded,
    which makes the first-order Shannon rate an inaccurate performance\r\nmetric for
    such communication systems. A more accurate approximation of the\r\nachievable
    rates of finite-block-length (FBL) coding regimes is known as the\r\nnormal approximation
    (NA). It is therefore of substantial interest to study the\r\noptimization of
    the FBL rate in multi-user multiple-input multiple-output\r\n(MIMO) systems, in
    which each user may transmit and/or receive multiple data\r\nstreams. Hence, we
    formulate a general optimization problem for improving the\r\nspectral and energy
    efficiency of multi-user MIMO-aided ultra-reliable\r\nlow-latency communication
    (URLLC) systems, which are assisted by reconfigurable\r\nintelligent surfaces
    (RISs). We show that a RIS is capable of substantially\r\nimproving the performance
    of multi-user MIMO-aided URLLC systems. Moreover, the\r\nbenefits of RIS increase
    as the packet length and/or the tolerable bit error\r\nrate are reduced. This
    reveals that RISs can be even more beneficial in URLLC\r\nsystems for improving
    the FBL rates than in conventional systems approaching\r\nShannon rates."
author:
- first_name: Mohammad
  full_name: Soleymani, Mohammad
  last_name: Soleymani
- first_name: Ignacio
  full_name: Santamaria, Ignacio
  last_name: Santamaria
- first_name: Eduard
  full_name: Jorswieck, Eduard
  last_name: Jorswieck
- first_name: Robert
  full_name: Schober, Robert
  last_name: Schober
- first_name: Lajos
  full_name: Hanzo, Lajos
  last_name: Hanzo
citation:
  ama: Soleymani M, Santamaria I, Jorswieck E, Schober R, Hanzo L. Optimization of
    the Downlink Spectral- and Energy-Efficiency of  RIS-aided Multi-user URLLC MIMO
    Systems. <i>arXiv:240216434</i>. Published online 2024.
  apa: Soleymani, M., Santamaria, I., Jorswieck, E., Schober, R., &#38; Hanzo, L.
    (2024). Optimization of the Downlink Spectral- and Energy-Efficiency of  RIS-aided
    Multi-user URLLC MIMO Systems. In <i>arXiv:2402.16434</i>.
  bibtex: '@article{Soleymani_Santamaria_Jorswieck_Schober_Hanzo_2024, title={Optimization
    of the Downlink Spectral- and Energy-Efficiency of  RIS-aided Multi-user URLLC
    MIMO Systems}, journal={arXiv:2402.16434}, author={Soleymani, Mohammad and Santamaria,
    Ignacio and Jorswieck, Eduard and Schober, Robert and Hanzo, Lajos}, year={2024}
    }'
  chicago: Soleymani, Mohammad, Ignacio Santamaria, Eduard Jorswieck, Robert Schober,
    and Lajos Hanzo. “Optimization of the Downlink Spectral- and Energy-Efficiency
    of  RIS-Aided Multi-User URLLC MIMO Systems.” <i>ArXiv:2402.16434</i>, 2024.
  ieee: M. Soleymani, I. Santamaria, E. Jorswieck, R. Schober, and L. Hanzo, “Optimization
    of the Downlink Spectral- and Energy-Efficiency of  RIS-aided Multi-user URLLC
    MIMO Systems,” <i>arXiv:2402.16434</i>. 2024.
  mla: Soleymani, Mohammad, et al. “Optimization of the Downlink Spectral- and Energy-Efficiency
    of  RIS-Aided Multi-User URLLC MIMO Systems.” <i>ArXiv:2402.16434</i>, 2024.
  short: M. Soleymani, I. Santamaria, E. Jorswieck, R. Schober, L. Hanzo, ArXiv:2402.16434
    (2024).
date_created: 2024-04-05T09:16:32Z
date_updated: 2024-04-05T13:18:19Z
department:
- _id: '263'
external_id:
  arxiv:
  - '2402.16434'
language:
- iso: eng
publication: arXiv:2402.16434
status: public
title: Optimization of the Downlink Spectral- and Energy-Efficiency of  RIS-aided
  Multi-user URLLC MIMO Systems
type: preprint
user_id: '67076'
year: '2024'
...