EvoLogics - Hydroacoustic Modems with SC2 Intelligent Underwater Telemetry

EvoLogics is a Berlin based R&D company (a spin-off of the Technical University, Berlin) focussing on the implementation of innovative knowledge and procedures from a broad range of bionics to marketable products. The fields of competence of our international team of scientists and engineers cover key technologies for marine applications such as high performance underwater communication and sonar, underwater robotics, fluid dynamic shape optimization and low noise propulsion systems.

UNDERWATER DATA TRANSMISSION

Let your marine systems benefit from EvoLogic's intelligent underwater telemetry. The revolutionary Sweep-Spread-Carrier (S2C) technology provides optimum underwater data transmission.

S2C technology inside means unrivalled performance and reliability under virtually any underwater data transmission scenario. We have proven that all over the world. Taking the market's most advanced underwater telemetry into an easy, flexible modular design is our try to make it even better.

INTELLIGENT UNDERWATER TELEMETRY

The Sweep-Spread Carrier (S2C) communication technology is now established as possibly the most accurate and efficient method for acoustic digital data transmission in tricky spreading environments such as a horizontal underwater (multipath) channel.

The S2C progression has moved through the development of the modem S2C-80 (depth rating 100m, telemetry distance up to 2,000m, nominal bitrate up to 20kbps) via the modem S2C-180 (depth rating 100m, telemetry distance up to 2,000m, bitrate up to 33kbps) and finally the modem S2C-280 (depth rating 6,000m, telemetry distance up to 4,000m, bitrate up to 20kbps). Since introduction, all the models have been exploited in various applications for data telemetry between a ship and Autonomous Underwater Vehicles (AUVs) such as HUGIN 1000, AUV2000 or RIF and in various areas such as Atlantic Ocean, Baltic Sea and Black Sea.

HYDROACOUSTIC MODEMS

EvoLogics offers a product line of S2C communication hydroacoustic modems. The main features of S2C hydroacoustic modems include:

• High-speed data telemetry in both horizontal (shallow water) and vertical underwater channels
• Working ranges up to 2,000m (6,000m option)
• Operating depths up to 100m (6,000m option)
• Data rates up to 33kbps (20kbps option)
• Guaranteed data delivery
• Built-in error correction
• Adaptive 'in-situ' communication algorithms
• Built-in relative speed and distance measurements
• Signal integrity and multipath structure diagnostics
• UW network-node functions
• Robust modular design (OEM option)

ADVANTAGES OF S2C OVER OTHER UNDERWATER TELEMETRY SYSTEMS

Until now there have been various models of underwater telemetry systems, which achieved rather good performance in vertical or direct-path underwater channels but very poor performance working in horizontal multipath channels. Desired modem characteristics such as bitrate and error probability were achievable only under simple channel conditions (direct-path signal propagation) but were quite not realistic for data telemetry under complicated conditions of variable multipath channels.

In contrast to others, the S2C technology has recently proven to be reliable for data telemetry under virtually any transmission scenario, keeping unrivalled performance. This creates an opportunity for numerous prospective users to increase the potential of their own applications, e.g. for AUVs to improve their survey efficiency, for underwater arrangements to extend their deployment areas etc.

SC2 UNDERWATER DATA TELEMETRY APPLICATIONS

The practical results have demonstrated conclusively the successful operation of our data telemetry technology for advanced sub-sea applications. The high technology UW-modems provide completely new quality of the acoustic data telemetry in underwater channels.

There are many potential applications which will require implementation of S2C data telemetry systems with high performance (high bitrates, low error probability and long distances), for example sub-sea acoustic networks with quasi-duplex communication, tsunami early warning systems, communication systems with USBL tracking capabilities and simultaneous data transmission etc.