Bit Error Rate Analysis of NOMA-OFDM in 5G Systems with Non-Linear HPA with Memory

Alexander Hilario-Tacuri, Jesus Maldonado, Mario Revollo, Hernan Chambi

Research output: Contribution to journalArticlepeer-review


The orthogonal frequency division multiplexing (OFDM) and the non-orthogonal multiple access (NOMA) scheme are presented as promising techniques to meet the requirement of fifth-generation (5G) communication systems. Although much attention has recently been devoted to study these techniques, some scenarios have still been less explored. Considering that a fundamental part of any communication system is the use of power amplifiers, this paper presents an analytical evaluation of the bit error rate (BER) of NOMA-OFDM systems in the presence of a high power amplifier (HPA) with memory. Considering that the non-linear distortions generated by the HPA can be modeled using a polynomial model with memory, new theoretical expressions are developed to obtain the BER of the system. Specifically, exact BER expressions for a downlink NOMA-OFDM system with two users are presented and verified by Monte Carlo simulation results. The obtained numerical results demonstrate that the performance degradation of both users is highly dependent on the non-linear distortions, even when the successive interference cancellation (SIC) technique is performed perfectly.

Original languageEnglish
Article number9448200
Pages (from-to)83709-83717
Number of pages9
JournalIEEE Access
StatePublished - 2021

Bibliographical note

Publisher Copyright:
© 2013 IEEE.


  • 5G
  • bit error rate
  • high power amplifier
  • non-linearity
  • non-orthogonal multiple access
  • orthogonal frequency division multiplexing


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