Joint Interleaver and Modulation Design for Multi-User SWIPT-NOMA

Yizhe Zhao, Jie Hu, Zhiguo Ding, Kun Yang

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

Radio frequency (RF) signals can be relied upon for conventional wireless information transfer (WIT) and for challenging wireless power transfer (WPT), which triggers the significant research interest in the topic of simultaneous wireless information and power transfer (SWIPT). By further exploiting the advanced non-orthogonal-multiple-access (NOMA) technique, we are capable of improving the spectrum efficiency of the resource-limited SWIPT system. In our SWIPT system, a hybrid access point (H-AP) superimposes the modulated symbols destined to multiple WIT users by exploiting the power-domain NOMA, while WPT users are capable of harvesting the energy carried by the superposition symbols. In order to maximize the amount of energy transferred to the WPT users, we propose a joint design of the energy interleaver and the constellation rotation-based modulator in the symbol-block level by constructively superimposing the symbols destined to the WIT users in the power domain. Furthermore, a transmit power allocation scheme is proposed to guarantee the symbol-error-ratio (SER) of all the WIT users. By considering the sensitivity of practical energy harvesters, simulation results demonstrate that our scheme is capable of substantially increasing the WPT performance without any remarkable degradation of the WIT performance.

Original languageBritish English
Article number8778776
Pages (from-to)7288-7301
Number of pages14
JournalIEEE Transactions on Communications
Volume67
Issue number10
DOIs
StatePublished - Oct 2019

Keywords

  • constellation rotation based modulation
  • energy interleaving
  • NOMA
  • RF based WPT
  • SWIPT

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