As radio telescopes evolve into large-scale, distributed antenna arrays capturing faint cosmic signals across vast distances, the demand for precise synchronization has never been greater. Multi-Tile Synchronization (MTS) plays a central role in ensuring that every data sample from each receiver is time-aligned, phase-coherent, and scientifically accurate forming the foundation of modern radio astronomy systems.
Understanding Multi-Tile Synchronization
In FPGA-based data acquisition systems, such as those built on AMD’s Zynq™ UltraScale+™ RFSoC, each tile (or converter block) contains multiple ADCs and DACs operating at multi-gigasample rates. MTS ensures all these converter tiles and even multiple devices or boards operate in perfect phase and timing alignment.
Without precise synchronization, even nanosecond-level skew can distort beamforming results, reduce sensitivity, and corrupt correlation data in multi-antenna telescope arrays. Hence, MTS ensures deterministic timing across tiles, guaranteeing consistent sampling and accurate cross-correlation between antenna elements.
Importance of MTS in Radio Telescope
In large telescope arrays, signals from multiple antennas must be sampled, digitized, and transported with nanosecond-level synchronization. Multi-tile synchronization ensures that every RF channel across different ADC/DAC tiles or FPGA devices remains phase-aligned, enabling coherent beamforming and correlation.
Multi-tile sync ensures:
- Phase coherence across multiple RF channels
- Deterministic latency between boards/devices
- Accurate timestamp alignment for array correlation
This synchronization precision directly impacts the telescope’s ability to detect weak astronomical signals and to combine them effectively across antenna arrays spread over large distances.
RFSoC Advantage in MTS Implementation
The AMD RFSoC architecture integrates multi-gigasample ADCs and DACs, programmable logic, and embedded processors within a single chip — significantly simplifying multi-channel synchronization compared to traditional multi-chip systems.
By leveraging integrated clocking and reference synchronization features, RFSoC-based designs eliminate complex external circuitry while maintaining exceptional signal fidelity, a crucial factor in large telescope backends.
iWave’s Expertise in Radio Telescope
iWave has a proven track record in RF digitization systems tailored for radio astronomy. Our engineering expertise covers advanced clock synchronization techniques such as 1 PPS, 10 MHz reference, and White Rabbit to support coherent operation across telescope arrays. With careful low-jitter design and strong focus on signal integrity in high-frequency RF paths, iWave enables reliable, high-performance digitization pipelines. Leveraging a comprehensive portfolio of AMD RFSoC and Altera Agilex™ 9 Direct RF System on Modules, we deliver scalable solutions that integrate high-speed ADCs/DACs and provide ultra-low-latency RF pipelines for telescope receivers. These SoMs also support multi-board synchronization, making them ideal for distributed telescope systems.
Complementing our hardware expertise, iWave has developed strong capabilities in high-speed networking stacks, including UDP, TCP, and RoCEv2. Our in-house SmartNICs are optimized for 400G/800G Ethernet throughput, ensuring efficient low-latency packetization and transport of massive data streams to backend HPC clusters. These solutions have been validated in real-time telescope backend pipelines, demonstrating iWave’s ability to bridge high-speed RF acquisition with scalable compute infrastructure in demanding scientific applications.
Radio astronomy is entering the 400G/800G Ethernet era, where backend systems must handle multi-terabit data with deterministic latency and precise synchronization. FPGA platforms such as AMD Zynq™ UltraScale+™ RFSoC, Altera Agilex™ 7, Agilex™ 9 and Achronix Speedster7t deliver the integration, scalability, and performance needed for these next-generation observatories.
With deep RF expertise, FPGA SoM platforms, and ODM capabilities, iWave empowers research institutions to accelerate development, reduce risk, and build scalable telescope backends that are ready for the future of discovery.
iWave is a global leader in the design and manufacturing of FPGA System on Modules and ODM Design Services. With over 26 years of diverse experience in the FPGA domain and a strong design-to-deployment competence, iWave strives to transform your ideas into time-to-market products with reliability, cost, and performance balance. Looking for more insights? Contact us at mktg@iwave-global.com to explore how our RF enabled FPGA portfolio empowers customers with flexible, high-performance platforms for radio telescope and radio astronomy domain customers.
