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Fundamental limits of Smultaneous Information and Energy Transmission and Reception

Haji Abdollahi Bafghi, Ali | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50006 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Aref, Mohammad Reza; Mirmohseni, Mahtab
  7. Abstract:
  8. Nowadays energy consumption becomes an important design factor in communication systems because of financial reasons and environmental concerns. There would be many equipments with large energy consumption in next generation (5G) networks, so energy efficiency will play an important rule in these networks. Two alternative techniques used for energy consumption management are energy harvesting and simultaneous wireless information and power transfer (SWIPT). A useful scenario in SWIPT is to use received energy for future transmissions. In this scenario, the design of encoder and decoder is a new open problem, because of the memory now appeared in the system. Thus to understand the interplay among energy and information and also to obtain the optimal coding structure in this scenario, an information theoretic model works. This is a challenging problem in multi-hop networks. In this work, we study the problem of joint information and energy transfer in a two-hop channel with an energy harvesting relay. We consider a finite battery size at the relay and deterministic energy loss in transmitting energy. In other words, to be able to send an energy-contained symbol, the relay must receive multiple energy-contained symbols. Thus, we face a kind of channel with memory. We model the energy saved in battery as channel state with the challenge that the receiver does not know the channel state. First, we consider the problem without any channel noise and introduce a coding scheme which depends on channel state. Next, we extend the results to the case with an independent and identically distributed noise in the second hop (the relay-receiver link). Then, we introduce the problem of stochastic energy loss and extend the results to the case with stochastic energy loss and noise in both hops. In addition, We introduce a completely different coding scheme with equivalent timing channel for the case with noise in the first hop
  9. Keywords:
  10. Information Theory ; Energy Harvesting ; Simultaneous Power and Data Transfer ; Two-Hop Relaying ; Wireless Energy Transmission

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