ARLINGTON, VIRGINIA — June 07, 2026 : The U.S. Defense Advanced Research Projects Agency (DARPA) has launched the Lightweight Universal Codec (LUC) program, a new initiative aimed at developing a single encoder-decoder system capable of operating across different military radios, satellite links, and data networks.
The program was announced through Special Notice DARPA-SN-26-86, published on June 5, 2026. Managed by DARPA’s Information Processing Techniques Office (IPTO) and led by Program Manager Allyson O’Brien, the initiative seeks to solve interoperability challenges caused by the use of multiple communication standards across military systems.
Universal Decoder Based on GRAND Technology
A key component of the program is Guessing Random Additive Noise Decoding (GRAND), a technology developed through research involving the Massachusetts Institute of Technology (MIT), Boston University, and Northeastern University.
Unlike conventional decoders that are designed for specific error-correction standards, GRAND uses a code-agnostic approach. It analyzes and removes communication noise to recover transmitted data, allowing a single decoder to process multiple error-correction codes without prior knowledge of the coding method used.
DARPA aims to translate this technology into a practical military codec capable of supporting both existing and future communication standards.
Adaptive Encoder for Real-Time Optimization
The LUC program also seeks to develop an adaptive encoder capable of selecting the most suitable error-correction code in real time based on:
- Channel conditions
- Available power
- Data throughput requirements
- Mission needs
The encoder will work alongside the GRAND-based decoder, using feedback from the communication link to optimize performance and reliability.
Focus on Low-Power Communications
A major objective of the program is reducing power consumption for military communication systems.
DARPA noted that previous GRAND-based technologies, including ORBGRAND, demonstrated energy efficiency below 0.8 picojoules per bit and power consumption as low as 4.9 milliwatts. The agency aims to build on these advances to support battery-powered radios, dismounted soldiers, and small unmanned systems.
Lower power requirements could help extend battery life, reduce equipment size, and lower thermal signatures in operational environments.
Open Participation and Commercial Applications
The program will operate at the unclassified level, allowing participation from universities, commercial telecommunications companies, and non-traditional defense contractors.
DARPA expects the open approach to encourage collaboration and leverage existing advances in 5G and satellite communications technologies. Participants will be able to select their own communication systems for testing and integration.
Interested organizations have until June 19, 2026, to respond to the special notice.
Potential Operational Impact
If successful, the Lightweight Universal Codec could enable military radios and networks using different communication standards to exchange information directly without relying on additional gateways or relay systems.
DARPA believes the technology could improve interoperability, reduce communication complexity, and enhance information sharing across soldiers, aircraft, ships, satellites, and command centers operating in contested environments.
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