Underwater Acoustic Ranging : Announcing High Precision Ranging Accuracy of 1cm
High-Precision Underwater Acoustic Ranging by DSPComm
DSPComm has successfully developed and demonstrated a high-precision underwater acoustic ranging (distance measurement) system using the latest generation AqucommGen2 acoustic modems.
The AqucommGen2 modems are capable of achieving exceptional ranging accuracy of better than ±1 cm—a significant advancement in underwater wireless technology. This level of precision has been validated through extensive testing in a closed body of water, an environment known for strong acoustic reflections and severe multipath interference.
Mentioning the closed-water test environment is important: such conditions are among the most challenging for acoustic ranging systems. Despite this, the AqucommGen2 modems consistently demonstrated the ability to mitigate multipath effects and maintain outstanding measurement accuracy.
This performance did not occur by chance. It is the result of many hours of innovation, testing, and refinement by DSPComm’s expert team of digital signal processing (DSP) and embedded systems engineers, who designed advanced signal processing techniques specifically to overcome real-world underwater acoustic challenges.
Applications for Underwater Acoustic Ranging
This breakthrough in underwater ranging enables a wide range of practical and high-value applications, including:
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Localization and tracking of Autonomous Underwater Vehicles (AUVs)
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Autonomous navigation for AUVs and mobile subsea platforms
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High-precision subsea surveying for offshore oil and gas operations
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Dynamic Positioning Systems (DPS) for vessels and Remotely Operated Vehicles (ROVs)
Unlike most traditional DPS solutions, which focus solely on positioning, AqucommGen2 modems integrate high-precision ranging with underwater data communication. The system supports peer-to-peer communication as well as ad-hoc subsea wireless networking, all within a single device (configuration-dependent). This convergence of ranging and data exchange significantly expands system capability while reducing overall deployment complexity and cost.
Long-Range Capability and Environmental Considerations
The AqucommGen2 modems offer a standard operating range of up to 5 km, with extended ranges of up to 10 km achievable using the high-power variant.
In long-range deployments, ranging accuracy can be influenced by acoustic ray bending caused by thermoclines within the water column. However, this effect can be mitigated by:
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Measuring the water temperature profile, and/or
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Deploying multiple nodes to estimate and compensate for sound-speed variations
By combining data communication, ranging, and environmental awareness, AqucommGen2 enables accurate distance estimation even in complex ocean conditions.
Enabling Cost-Effective Subsea Systems
The fusion of high-precision ranging and reliable underwater data communication in a single platform allows many subsea applications to be implemented more efficiently and cost-effectively than traditional solutions. AqucommGen2 opens the door to smarter, more autonomous, and more connected underwater systems.