29-07-2010, 06:19 PM
Underwater sensor network
using optical wireless
communication
Considerable
research has been conducted to develop and assess methods
of sensing the ocean on spatial and temporal scales. Potential applications for distributed networks of sensors are numerous
and varied.There is rampant research into the field of communication protocols, energy harvesting, and microelectronic device fabrication . The underwater OWC must tolerate scattering of light by particles in the channel. The scattering can also be be exploited as a sensing mechanism just as in the case of LIDAR. a sensor
system for atmospheric investigation is described in this article. This uses lidar and orthogonally coded data signals is used to overcome multiaccess interference problems. fine-grained data acquisition systems operating at high resolution
and over long periods of time can be satisfactorily built from that very small scale,
mobile, and low cost sensor networks. sensing, data communication, and the inevitable
multiaccess interference (MAI)b are the major non-avoidable challenges in the system.
As an example, a cluster of sensor nodes separated from a base station by the water around is taken . The hardware essentially consists of an entrance
aperture, a tunable spectral filter, and a matrix of detectors. reception of data signals
at different wavelengths i smade possible by the spectral filter. detector matrix separates
the signals from sensor nodes located in reduced field-of-view. The main problems of OWC stem from acute scattering and absorption encountered by light propagating
underwater. aqueous medium.
for more details refer this pdf:
http://spiedocuments/Newsroom/Imported/490/2007010490.pdf
using optical wireless
communication
Considerable
research has been conducted to develop and assess methods
of sensing the ocean on spatial and temporal scales. Potential applications for distributed networks of sensors are numerous
and varied.There is rampant research into the field of communication protocols, energy harvesting, and microelectronic device fabrication . The underwater OWC must tolerate scattering of light by particles in the channel. The scattering can also be be exploited as a sensing mechanism just as in the case of LIDAR. a sensor
system for atmospheric investigation is described in this article. This uses lidar and orthogonally coded data signals is used to overcome multiaccess interference problems. fine-grained data acquisition systems operating at high resolution
and over long periods of time can be satisfactorily built from that very small scale,
mobile, and low cost sensor networks. sensing, data communication, and the inevitable
multiaccess interference (MAI)b are the major non-avoidable challenges in the system.
As an example, a cluster of sensor nodes separated from a base station by the water around is taken . The hardware essentially consists of an entrance
aperture, a tunable spectral filter, and a matrix of detectors. reception of data signals
at different wavelengths i smade possible by the spectral filter. detector matrix separates
the signals from sensor nodes located in reduced field-of-view. The main problems of OWC stem from acute scattering and absorption encountered by light propagating
underwater. aqueous medium.
for more details refer this pdf:
http://spiedocuments/Newsroom/Imported/490/2007010490.pdf
