Offshore operation demands that all systems must work even under harsh conditions. The key to this success is to have a reliable data connection with any malfunction increasing the risk to the operation. Under good conditions, currently available underwater modems can transmit data satisfactorily. However, when the hydroacoustic conditions turn worse due to interfering noise and varying multipath propagation etc., a superior technology modem is required. Even in calm seas, the stratification of water body can cause severe signal reverberations and dynamic fluctuation of channel properties, resulting in poor transmission.
Dolphins and whales have adapted to the situation under water very well, communicating over long distances. They chirp and sing across a broad frequency bandwidth. This continuous change of frequencies not only serves to transmit information, but also to compensate for sources of interference such as echoes and noise.
Building upon eight years of studies on the physics of dolphin communication, EvoLogics has developed the patented Sweep Spread Carrier (S2C) technology. To mimic dolphin sound pattern, modems built on S2C technology continuously spread the signal energy over a wide range of frequencies and adapt the signal structure so that the multipath components do not interfere with each other. At the receiver end, advanced signal processing collects the energy and converts the received signals into narrow band signals. This results in achieving significant depression of multipath disturbances and substantial system gain, enabling successful decoding of signals also in crucial environments even when they are heavily masked by noise.
M- Series Underwater Acoustic Modems
| Device | Application |
|---|---|
| S2C M HS | Ultra-high-speed device for fast short-range transmissions in shallow waters |
| S2C M 48/78 | High-speed device for short-range applications in shallow waters |
| S2C M 42/65 | High-speed device for short- and medium-range applications, wide-angle beam pattern for communication in vertical, slant and horizontal channels |
| S2C M 18/34 | All-round performer for medium-range applications |
R- Series Underwater Acoustic Modems
| Device | Application |
|---|---|
| S2C R 48/78 | High-speed device for short-range applications in shallow waters |
| S2C R 40/80 | High-speed device for medium-range applications in shallow waters, 70-degrees conical beam pattern optimal for vertical or slant channels |
| S2C R 42/65 | High-speed device for short- and medium-range applications, wide-angle beam pattern for communication in vertical, slant and horizontal channels |
| S2C R 18/34 | All-round performer for medium-range applications |
| S2C R 15/27 | Depth-rated device for medium- and long-range applications, low power consumption – best for long-term deployment, 110-degrees wide-angle beam pattern optimal for various channels |
| S2C R 12/24 | Depth-rated device for medium- and long-range applications, low power consumption – best for long-term deployment, 70-degrees conical beam pattern optimal for vertical or slant channels |
| S2C R 7/17 | Depth-rated device for long-range applications, hemispherical beam pattern, low power consumption – best for long-term deployment |
| S2C R 7/17D | Depth-rated directional device for long-range applications, 80-degrees beam pattern for vertical and slant channels, low power consumption – best for long-term deployment |
| S2C R 7/17W | Depth-rated wide-angle device for long-range applications, hemispherical beam pattern, low power consumption – best for long-term deployment |
| S2C OEM Modems | EvoLogics underwater acoustic modems are available in OEM configuration for integration with other systems |
| S2C mounting frames | EvoLogics S2C mounting frames are intended for proper mounting of S2C devices and offer additional protection against mechanical damage for the fragile components of S2C devices |
More information from EvoLogics
