ISSN 1024-8560, Atmospheric and Oceanic Optics, 2017, Vol. 30, No. 4, pp. 366–371. © Pleiades Publishing, Ltd., 2017.
Original Russian Text © V.V. Belov, V.N. Abramochkin, Yu.V. Gridnev, A.N. Kudryavtsev, M.V. Tarasenkov, A.V. Fedosov, 2017, published in Optika Atmosfery i Okeana.
Bistatic Optoelectronic Communication Systems:
Field Experiments in Artificial and Natural Water Reservoirs
V. V. Belov
*, V. N. Abramochkin
, Yu. V. Gridnev
, A. N. Kudryavtsev
M. V. Tarasenkov
**, and A. V. Fedosov
V.E. Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, Tomsk, 634055 Russia
Tomsk State University, Tomsk, 634050 Russia
Received August 25, 2016
Abstract—Results of field experiments performed with bistatic optoelectronic communication systems in
artificial and natural water reservoirs in 2015 are discussed. The experiments were aimed at estimation of the
communication quality from the communication error probabilities and their standard deviations. Results of
the experiments assume possibilities of creating optoelectronic communication systems capable of effectively
operating in water and complex media (water–atmosphere and atmosphere–water, including ice interface)
with communication line lengths from several tens to several hundreds of meters.
Keywords: NLOS communication systems, laser radiation scattering in water and in the atmosphere, commu-
nication error probability
Optoelectronic communication systems (OECS)
with in-line optical axes of the receiving and transmit-
ting units, i.e., operating within the line-of-sight range
and called LOS (line of sight), are widely used, well
studied, and developed also with the aim of their
application in water or complex media (water–atmo-
sphere and atmosphere–water) [1–5]. Nonscattered
optical radiation is a useful signal in these systems.
Theoretical and experimental studies of OECS are
of interest, where optical radiation (in particular,
laser) scattered in the atmosphere, water, and complex
media is the information source and a useful signal,
because there are conditions under which only these
systems can ensure stable multicast communication,
which is impossible in the radio or acoustic wavelength
ranges, for example, radio- (acoustic-) silence mode,
specific data communication rate, etc. This circum-
stance can explain publication activity in these fields
in the past decade (e.g., [6–20]). Let us emphasize
that capabilities of such OECS were discussed in sci-
entific literature in the previous century (e.g., ).
Problems of theoretical studies of communication
properties of external channels of OECS with scatter-
ing or with bistatic laser sensing in scattering and
absorbing media have been largely overcome or con-
tinue to be discussed, e.g., in [6–15, 19–27]. There are
far fewer publications devoted to the results of field
tests of bistatic, or non-line-of-sight (NLOS), OECS.
Works [16–18] deal with atmospheric tests.
In this work, we report first results of testing these
communications systems in water and complex media,
in artificial and natural water reservoirs.
CONTENTS, EQUIPMENT, AND GEOMETRY
The sense and contents of the experiments con-
sisted in the following. Test information was input in
laser radiation, which was directed in a medium,
received by an optoelectronic system (OES) oriented
to the scattered background, decoded, and compared
with the initial information for estimation of the prob-
ability of symbol transfer error and the standard devi-
ation. The information was input in the laser radiation
via controlling the pulse generation time (i.e., with the
use of the time-pulse modulation). The duration of
each communication session varied from 7 to 30 min
at a fixed experimental geometry; the information
included from 7000 to 90000 symbols. Each experi-
ment lasted from 1 to 3 h.
The NLOS OECS, which was tested in the atmo-
sphere and described in detail in [16–18], was used as
a basis for our experiments. We changed a stationary
CuBr laser to a mobile (wavelength λ = 510.6 nm,
mean power of 800 mW) or small semiconductor laser