Τίτλος:
Signal Intensity Estimation in Transdermal Optical Wireless Links with
Stochastic Pointing Errors Effect
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
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.
Συγγραφείς:
Varotsos, George K.
Nistazakis, Hector E.
Aidinis, Konstantinos
and Jaber, Fadi
Mujeeb Rahman, K. K.
Περιοδικό:
Dissolution Technologies
Λέξεις-κλειδιά:
transdermal optical wireless (TOW) links; medical implanted devices
(IMDs); minimum mean-square error (MMSE) estimation; pointing errors
DOI:
10.3390/technologies8040060
