Performance Analysis of NOMA-Based Land Mobile Satellite Networks

Xiaojuan Yan, Hailin Xiao, Cheng-Xiang Wang, Kang An, Anthony Theodore Chronopoulos, Gan Zheng

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Abstract

Non-orthogonal multiple access (NOMA) scheme, which has the ability to superpose information in the power domain and serve multiple users on the same time/frequency resource, is regarded as an effective solution to increase transmit rate and fairness. In this paper, we introduce the NOMA scheme in a downlink land mobile satellite (LMS) network and present a comprehensive performance analysis for the considered system. Specifically, we first obtain the power allocation coefficients by maximizing the sum rate while meeting the predefined target rates of each NOMA user. Then, we derive the theoretical expressions for the ergodic capacity and the energy efficiency (EE) of the considered system. Moreover, the outage probability (OP) and average symbol error rate (ASER) performances of NOMA users are derived analytically. To gain further insights, we derive the asymptotic OP at the high signal-to-noise ratio (SNR) regime to characterize the diversity orders and coding gains of NOMA users. Finally, simulation results are provided to validate the theoretical analysis as well as the superiority of employing the NOMA scheme in the LMS system, and show the impact of key parameters such as fading configurations and user selection strategy on the performance of NOMA users.

Original languageEnglish
JournalIEEE Access
Early online date7 Jun 2018
DOIs
Publication statusE-pub ahead of print - 7 Jun 2018

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Keywords

  • average symbol error rate
  • energy efficiency
  • ergodic capacity
  • Land mobile satellite network
  • non-orthogonal multiple access
  • outage probability

ASJC Scopus subject areas

  • Computer Science(all)
  • Materials Science(all)
  • Engineering(all)

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