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Underwater IoT

ModemGard AI-Based Acoustic Modems

Advanced Underwater Communication Systems Enabling the Underwater Internet of Things

ModemGard Series comprises MarineGard's advanced acoustic communication modems engineered to establish reliable, intelligent, and adaptive underwater data links where conventional RF systems fail. Available in two purpose-built models for different mission profiles.

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ModemGard Classic

Key Features

Adaptive PSK-Based Underwater Acoustic Modem

First-generation acoustic communication modem for reliable underwater data transmission. Operating at 46 kHz with BPSK, QPSK, and 8-PSK modulation schemes, achieving 9.6–28.8 kbps data rates with >1 km communication range under normal conditions.

Robust Signal Performance

Piezoceramic transducers with 140–150 dB TVR and D-class amplifiers deliver strong signal performance in dynamic marine environments.

Adaptive Modulation

Automatic modulation switching (BPSK/QPSK/8-PSK) and error correction ensure data integrity across varying channel conditions.

Wide Range Coverage

>1 km communication range with at least 10 dB SNR for reliable subsea data links.

High Power Output

D-class amplifiers provide up to 1000V output with 300–400W power for long-distance transmission.

Technical Specifications

Specification
Value
Operating Frequency
46 kHz band
Modulation Schemes
BPSK, QPSK, 8-PSK
Data Rates
9.6 kbps to 28.8 kbps
Communication Range
>1 km (normal conditions)
Transducers
Piezoceramic (140–150 dB TVR)
Sensitivity
–190 to –200 dB
Amplifiers
D-class (up to 1000V, 300–400W)
SNR Requirement
Minimum 10 dB

Applications

AUVs, ROVs, and underwater drones
Distributed underwater sensor networks
Pinger and localization systems
Harbor, port, and submarine security
Digital voice and data links in subsea environments

ModemGard AI

Key Features

Pattern-Based BVK Modulation Cognitive Underwater Modem

Next-generation cognitive underwater communication modem powered by Pattern-Based BVK Modulation (PBCCS). Dynamically learns and adapts to underwater channel conditions, maintaining reliable communication at SNR levels as low as –10 dB, extending operational range and performance by over 50%.

AI-Driven Cognitive Modulation

Proprietary PBCCS technology dynamically learns and adapts to underwater channel conditions in real-time.

Built-In Security

User-specific adaptive symbol glossaries provide encryption, signal uniqueness, and interference resistance.

Superior Performance

Operates reliably at –10 dB SNR with >50% extended range and performance vs. conventional modems.

Flexible Integration

IP-Core design enables deployment in software-defined radios (SDR) or FPGA-based systems.

Extreme Conditions Operation

Maintains reliable communication in low-SNR, high-noise, and challenging underwater environments.

Technical Specifications

Specification
Value
Modulation Type
Pattern-Based BVK Modulation (PBCCS)
AI Technology
Cognitive adaptive learning
Minimum SNR
–10 dB (operational)
Performance Gain
>50% vs. conventional PSK
Implementation
IP-Core for SDR/FPGA integration
Security
Built-in encryption via adaptive symbol glossaries
Noise Resilience
Advanced interference resistance

Applications

Autonomous underwater networks (UANs)
AI-optimized acoustic links
Secure, encrypted video and data transmission
Long-range and low-visibility underwater missions
Defense, industrial, and scientific applications

Series Comparison

Feature
Classic
AI
Technology
PSK-based (BPSK/QPSK/8-PSK)
AI-driven PBCCS
Data Rate
9.6–28.8 kbps
Adaptive (AI-optimized)
Minimum SNR
10 dB
–10 dB
Range
>1 km
>50% extended vs. Classic
Security
Standard error correction
Built-in encryption
Deployment
Standalone modem
IP-Core (SDR/FPGA)
Best For
Standard AUV/ROV, sensors
Defense, secure, long-range

Why Choose ModemGard Series?

Empowering the global Underwater IoT — connecting oceans, sensors, and autonomous systems

  • Enables Underwater Internet of Things (UIoT)
  • Two models for different mission profiles
  • Classic: Proven PSK technology with >1 km range
  • AI: Cognitive modulation with –10 dB SNR operation
  • >50% performance gain with ModemGard AI
  • Built-in security and encryption
  • Flexible deployment (standalone or IP-Core)
  • Ideal for defense, research, and commercial sectors
ModemGard Acoustic Modem Series

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