Optimal Power Allocation and Rate Combination in X-type NOMA Wireless Relay Networks

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Abstract

We study an X-type non-orthogonal multiple access (NOMA) wireless relay network that consists of an uplink multiple access channel and a downlink broadcast channel. We formulate a non-convex optimization problem to obtain an optimal power allocation factor and an optimal rate vector that maximize the end-to-end sum rate. To solve the optimization problem, we prove four theorems that contain closed-form expressions for the optimal solutions. We also use computer simulation to obtain some numerical results.

Original languageEnglish
Pages (from-to)1
Number of pages1
JournalIEEE Wireless Communications Letters
DOIs
StateAccepted/In press - 2023

Keywords

  • broadcast channel
  • multiple access channel
  • NOMA
  • non-convex optimization
  • non-orthogonal multiple access
  • Optimization
  • power allocation
  • rate combination
  • Relay networks
  • Resource management
  • Uplink
  • Wireless networks
  • Wireless relay networks
  • Wireless sensor networks

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