Signal Intensity Estimation in Transdermal Optical Wireless Links with Stochastic Pointing Errors Effect

Technologies

卷:8

Fadi Jaber¹  K. K.Mujeeb Rahman¹  Konstantinos Aidinis²  HectorE. Nistazakis³  GeorgeK. Varotsos³ 

[1] Department of Biomedical Engineering, Ajman University, Ajman, P.O. Box 346, UAE;

[2] Department of Electrical and Computer Engineering, Ajman University, Ajman, P.O. Box 346, UAE;

[3] Section of Electronic Physics and Systems, Department of Physics, National and Kapodistrian University of Athens, 15784 Athens, Greece;

关键词: transdermal optical wireless (TOW) links;    medical implanted devices (IMDs);    minimum mean-square error (MMSE) estimation;    pointing errors;   

DOI  :  10.3390/technologies8040060

来源: DOAJ

【 摘 要 】

Transdermal optical wireless (TOW) communication links have recently gained particular research and commercial attention as a viable alternative for establishing high speed and effective implantable data transmissions, which is vital for a variety of neuroprosthetic and other medical applications. However, the development of this optical telemetry modality with medical implanted devices (IMDs) is adversely affected by skin-induced photon absorption, scattering and pointing errors effects. Thus, in this work a minimum mean-square error (MMSE) criterion is proposed for the estimation of the optical signal intensity in a typical TOW link of varying path loss and misalignment-induced fading characteristics. In this context, the stochastic nature of the transmitter–receiver misalignment has been considered and jointly modeled with transdermal path loss. Additionally, the link is assumed to employ the suitable On–Off Keying (OOK) with intensity modulation and direct detection scheme as well as a PIN photodiode at the receiver side for signal detection. Under these assumptions the results demonstrate that the stochastic amount of pointing mismatch strongly affects the received irradiance estimation.

【 授权许可】

Unknown