Filtreler

2016 - 20182
Filtreleri Sıfırla

Ayarlar

Yazar: Kaya, Onur × Konu: Wireless telecommunication systems ×

Arama Sonuçları

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Yayın
    Energy and data cooperation in energy harvesting multiple access channel
    (Institute of Electrical and Electronics Engineers Inc., 2016-08-26) Gürakan, Berk; Şişman, Berrak; Kaya, Onur; Ulukuş, Sennur
    We consider the energy harvesting two user Gaussian multiple access channel (MAC), where both users harvest energy from nature. The users cooperate at the physical layer (data cooperation) by establishing common messages through overheard signals and then cooperatively sending them. In addition, the users cooperate at the battery level (energy cooperation) by wirelessly transferring energy to each other. We find the jointly optimal offline transmit power and rate allocation policy together with the energy transfer policy that maximizes the departure region. We provide necessary conditions for energy transfer, and prove some properties of the optimal transmit policy, thereby shedding some light on the interplay between energy and data cooperation.
  • Küçük Resim
    Yayın
    Energy efficient transmission scheduling for channel-adaptive wireless energy transfer
    (Institute of Electrical and Electronics Engineers Inc, 2018) Bacinoǧlu, Baran Tan; Kaya, Onur; Uysal Bıyıkoğlu, Elif
    We consider a fading communication link where the transmitter is powered by the receiver through wireless energy transfer (WET). A typical application scenario for this is the transmitter being a simple sensor while the demand for data is created by an application running at the receiver side and pulled from the transmitter as needed. We formulate two offline transmission scheduling problems: the transmitter-centric WET transmission optimization problem, where the schedule is computed by the transmitter, and the receiver-centric WET transmission optimization problem, where the receiver computes the schedule. We provide explicit solutions of both problems and propose online policies that rely on using the estimated water level values for each case. Our formulation allows direct optimization of energy efficiency in contrast to other EH transmission scheduling formulations in the literature. We prove some equivalence results under the special case of fixed channels.