Software-defined waveforms for satellite communications

Wasted spectrum,
returned. In software.

Rayphase is a software license for the radios already in orbit. One over-the-air update recovers the licensed spectrum operators cannot use today, holds throughput through weather, and hands power back to the payload. No new hardware. No new launches.

How it works Get in touch
30%of spectrum capacity wasted today, recovered in software
66%weather throughput drop on legacy links — throughput maintained
30%of satellite power spent correcting signals, returned to the payload
OTAdeploys as a software update to live satellites

The problem

AI is scaling beyond Earth —
but data infrastructure is not.

The space economy is transitioning from a hardware race to a data crisis. Over the next five years, the volume of data generated in orbit will increase by over 100 times — from gigabytes to exabytes flowing through low-Earth orbit every single day. Space hardware cannot keep up.

Spectrum waste

Radio frequencies are congested, and Doppler distortion forces guard bands that leave up to 30% of licensed spectrum sitting idle — paid for, but unusable.

Weather throughput loss

In severe weather, legacy links drop throughput by 66%, falling back to QPSK just to keep the link alive.

Power drain

Orbital speeds cause severe Doppler distortion, and correcting those signals consumes up to 30% of a satellite's power — power that is not available to run AI processors.

The hardware has hit its physical limit.

The solution

A Space AI Data Platform that prevents degradation instead of correcting it.

Rayphase improves satellite communication by embedding orbital motion and signal distortion awareness directly into data encoding. Our Affine Frequency Division Multiplexing (AFDM) based approach prevents degradation instead of correcting it after transmission — reducing wasted power and spectrum, and enabling high data throughput on existing satellite hardware for scalable AI workloads in orbit.

  • Full spectrum utilization — wasted guard band space eliminated
  • Doppler immunity — no data packet drops at high orbital speeds
  • Ultra-low compute overhead — satellite battery life and mission duration maximized
  • OTA deployable — a software update to live satellites, no hardware required

No custom silicon, no new ground hardware: Rayphase deploys as over-the-air firmware to the software-defined radios already flying.

Technology

Peer-reviewed science,
engineered for orbit.

Rayphase is built on the Affine Fourier Transform — our proprietary data layer natively mirrors the unique geometric dynamics of orbital transmission, stopping degradation before it starts. Our founders pioneered AFT-based multicarrier communications, with breakthrough results published in top-tier peer-reviewed journals — co-authored by our CEO — and theoretical performance superiority over OFDM proven through software simulations.

  1. Done

    Foundation proven

    Mathematical and spectral efficiency advantages of the AFDM waveform over OFDM proven through software simulations. Core foundational patent applications prepared.

  2. 2026

    Lab validation

    Synthesize AFDM algorithms with a design partner and validate performance via real-time RF lab testing. File patent applications.

  3. 2027

    Orbital demonstration

    Integrate space-qualified AFDM into the satellite architectures of early design partners and execute a joint orbital demonstration. Engage with standardization bodies like 6G NTN waveform standards.

  4. 2028

    Global deployment

    Scale production and license core firmware to satellite constellation operators for global deployment. Contribute to the work of the standardization bodies.

Team

Pioneers of next-generation
communication systems.

Djuro Stojanovic, PhD

Co-Founder, CEO

Serial founder with expertise in AI infrastructure and scaling enterprise software. Co-founded Uhura Solutions (Techstars Tel Aviv 2018), which raised $2.5M in funding. PhD in Space Telecommunications and co-author of the IEEE paper underpinning Rayphase's communication technology.

Marko Andrijasevic, MSc

Co-Founder & CTO

Director of Engineering at Automattic (WordPress.com), operating infrastructure at internet scale — 180M+ websites and 20B+ monthly page views. Expert in AI/ML with a track record of building production-grade platforms. MSc in Computer Science, specializing in Machine Learning.

Next-generation data platform for space communication

We make AI data move beyond Earth.

Operators, integrators, and researchers — we'd like to hear from you.

djuro@rayphase.com — CEO marko@rayphase.com — CTO