Research Information System
Thesis Type: Doctorate
Institution Of The Thesis: Karadeniz Technical University, Fen Bilimleri Enstitüsü, Turkey
Approval Date: 2021
Thesis Language: Turkish
Student: Yasin KARAN
Supervisor: Salim Kahveci
Abstract:
Wireless body area networks (WBAN) are communication networks between the sensors
and hubs in-body, on-body and out-body. IEEE 802.15.6 protocol has been developed for
such networks.
In this study, channel coding and modulation techniques proposed in IEEE 802.15.6
ultra-broadband (UWB) physical layer for reliable data transmission were investigated with
orthogonal frequency division multiplexing (OFDM) based dual carrier modulation (DCM)
techniques. First of all, WBAN channels were examined and a suitable model was chosen to
work on. By presenting different types of DCM, theoretical error probabilities were derived,
and compared with both channel coding technique with the same code rate as DCM and a
different transmitter diversity method. IEEE 802.15.6 UWB physical layer has been simulated
and compared with the DCM and types discussed in this study on the same WBAN channels
and according to the timing parameters proposed in the protocol.
Consequently, it was observed that the simulation results match the derived DCM
theoretical error probabilities. Especially in high level modulation, DCM performances have
been found higher than equivalent modulations and channel coding techniques. At high data
rates, performances of both protocol modulation and DCMs were very quiet low in WBAN
channels. Therefore, at high data rates, channel equalizer or higher subcarriers in OFDM
systems should be used.