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S2C Technology

Challenging hydroacoustic conditions represents huge barrier for reliable underwater communication

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.

Adapting a solution from nature: S2C underwater technology

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.