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Developers of software-defined radio (SDR) systems for defense, tactical communications, and drone/UAV command-and-control links face a familiar bottleneck: even the best RF transceiver silicon is only as useful as the platform built around it. Turning a wideband, multi-antenna RF front end into a working over-the-air link normally means months of FPGA integration work — clocking, digital interfaces, MIMO synchronization, and control software — before a single packet is ever transmitted.

To remove that bottleneck, Sequans and Enclustra have paired the Iris™ SQN9506 wideband RF transceiver with two Enclustra Mercury+ XU1 System-on-Module (SoM) and ST1 base board platforms, creating a ready-to-run 4×4 MIMO evaluation system. The result is a compact Tx/Rx link that can be configured, monitored, and visualized from a single PC — giving SDR developers a fast path from silicon evaluation to real RF link testing.

System Architecture Overview: Silicon Meets FPGA

The reference platform pairs Sequans’ RF expertise with Enclustra’s FPGA processing modules to deliver a powerful, symmetrical Tx/Rx system:

• Two Enclustra ME-XU1-6EG-1E-D11E Evaluation Kits, each built around an AMD Zynq UltraScale+ ZU9EG FPGA for high-throughput baseband and MIMO processing.
• Sequans Iris SQN9506 RF boards connected to each Mercury+ XU1 SoM through a standard FMC interface, keeping the RF and digital domains cleanly separated while remaining easy to integrate.
• One EVK configured as a 4×4 transmitter, the other as a 4×4 receiver, forming a point-to-point SDR link out of the box.
• A browser-based control interface for live FFT visualization and real-time adjustment of frequency, bandwidth, modulation, and gain, with the option to capture and save samples for offline analysis.

Why the Iris SQN9506 Is the Right RF Engine for This Platform

The SQN9506 is Sequans’ wideband RF transceiver purpose-built for agile SDR applications, and it’s what makes this reference design relevant well beyond a single use case:

• Wide frequency coverage from 220 MHz to 7.125 GHz, spanning VHF/UHF through U-NII bands in a single chip.
• Up to 200 MHz of instantaneous channel bandwidth, enabling wideband waveforms without external tuning.
• Native 4×4 MIMO on both Tx and Rx, with 20 receive paths, 4 transmit paths, and 10 RF synthesizers synchronized from a single clock.
• Super-fast frequency hopping across an unlimited frequency list, supporting anti-jam and resilient-link requirements.
• A SAW-filter-less, single-die architecture in an 8.4 mm x 4.8 mm x 1 mm package, simplifying board design without compromising performance.

Because the SQN9506 was designed for easy integration with any SDR CPU or FPGA, pairing it with the Enclustra Mercury+ XU1’s Zynq UltraScale+ processing power lets developers exercise the chip’s full RF capability — wideband, multi-antenna, frequency-agile — without first building that integration layer themselves.

Built for Drone, UAV, and Tactical Communication Links

The platform’s live 4×4 link is directly applicable to the command, control, video, and data links that connect vehicles to ground stations. Developers evaluating agile waveforms for UAV telemetry, tactical radios, or resilient point-to-point links can use the same setup to validate frequency hopping, MIMO gain, and bandwidth trade-offs under real RF conditions — well before committing to custom hardware.

Get Started

For more information on the SQN9506 architecture and its fit for SDR platforms, see the Sequans white paper, “High-Performance Transceiver for SDR Platforms.”

Details on the Mercury+ XU1 FPGA System-on-Module used in this reference platform are available on the Enclustra website.