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Outage probability analysis of uplink NOMA over ultra-high-speed FSO-backhauled systems

Jamali, M. V ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1109/GLOCOMW.2018.8644120
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. In this paper, we consider a relay-assisted uplink non-orthogonal multiple access (NOMA) system where two radio frequency (RF) users are grouped for simultaneous transmission, over each resource block, to an intermediate relay which forwards the amplified version of the users' aggregated signals in the presence of multiuser interference to a relatively far destination. In order to cope with the users' ever-increasing desire for higher data rates, a high-throughput free-space optics (FSO) link is employed as the relay-destination backhaul link. Dynamic-order decoding is employed at the destination to determine the priority of the users based on their instantaneous channel state information (CSI). Closed-form expressions for the individual- and sum-rate outage probability formulas are derived in the case of independent Rayleigh fading for the users-relay access links when the FSO backhaul link is subject to Gamma-Gamma turbulence with pointing error. This work can be regarded as an initial attempt to incorporate power-domain NOMA over ultra-high-speed FSO-backhauled systems, known as mixed RF-FSO systems
  6. Keywords:
  7. Channel state information ; Communication channels (information theory) ; Multiple access interference ; Rayleigh fading ; Closed-form expression ; Free space optics ; Instantaneous channel state informations ; Multi-user interference ; Outage probability ; Outage probability analysis ; Radio frequencies ; Simultaneous transmission ; Outages
  8. Source: 2018 IEEE Globecom Workshops, GC Wkshps 2018, 9 December 2018 through 13 December 2018 ; 2019 ; 9781538649206 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/8644120