Constrained codes for joint energy and information transfer

Ali Mohammad Fouladgar, Osvaldo Simeone, Elza Erkip

Research output: Contribution to journalArticlepeer-review


In various wireless systems, such as sensor RFID networks and body area networks with implantable devices, the transmitted signals are simultaneously used both for information transmission and for energy transfer. To satisfy the conflicting requirements on information and energy transfer, this paper proposes the use of constrained run-length limited (RLL) codes in lieu of conventional unconstrained (i.e., random-like) capacity-achieving codes. The receiver's energy utilization requirements are modeled stochastically, and constraints are imposed on the probabilities of battery underflow and overflow at the receiver. It is demonstrated that the codewords' structure afforded by the use of constrained codes enables the transmission strategy to be better adjusted to the receiver's energy utilization pattern, as compared to classical unstructured codes. As a result, constrained codes allow a wider range of trade-offs between the rate of information transmission and the performance of energy transfer to be achieved.

Original languageEnglish (US)
Article number6798673
Pages (from-to)2121-2131
Number of pages11
JournalIEEE Transactions on Communications
Issue number6
StatePublished - Jun 2014


  • Constrained codes
  • Renewal processes
  • Run-length limited codes
  • Wireless energy transfer

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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