NI CHESS Enables Software-Driven RF Channel Emulation Into Aerospace Testing

Why It Matters

Shifting RF validation to a software‑defined lab environment cuts expenses and schedule risk for aerospace programs, while delivering more realistic performance data than traditional simplified models.

Key Takeaways

• NI CHESS emulates RF channels using NI PXI hardware
• Real-time Doppler, fading, and interference simulation enabled
• Lab testing reduces costly field trials for aerospace communications
• Multi‑channel, wideband support fits next‑gen satellite systems
• Software architecture integrates with existing PXI investments

Pulse Analysis

The aerospace sector is increasingly reliant on high‑frequency communication links that must perform flawlessly across a range of dynamic environments. Emerson’s introduction of the NI Channel Emulator System Software (CHESS) marks a decisive move toward software‑defined testing, allowing engineers to recreate ground‑to‑orbit, airborne, and inter‑satellite channels inside a laboratory. By pairing the CHESS platform with NI’s PXI vector signal transceiver hardware, the solution delivers high‑fidelity emulation that mirrors real‑world propagation effects without the logistical burden of field campaigns. This transition aligns with a broader industry trend of virtualizing validation processes to accelerate development cycles.

At its core, CHESS combines model‑based simulation with hardware‑in‑the‑loop execution, leveraging FPGA co‑processors to inject impairments such as Doppler shift, multipath fading, path loss and interference in real time. The multi‑channel, wideband architecture supports simultaneous testing of several links, enabling complex constellation scenarios that were previously impractical. Integration with third‑party scenario tools and existing PXI infrastructure means organizations can extend the life of their test assets while adopting a more flexible, software‑centric workflow. The result is repeatable, deterministic testing that uncovers performance issues early in the design stage.

The business implications are immediate. By shifting a substantial portion of RF validation from costly field trials to controlled lab environments, program budgets can be trimmed and schedules compressed, a critical advantage in a market where launch windows are scarce. Moreover, the ability to run realistic, repeatable tests enhances risk management, giving satellite operators and defense contractors greater confidence in mission‑critical communications. As satellite constellations and hypersonic platforms proliferate, demand for scalable, software‑driven emulation tools like NI CHESS is poised to grow, positioning Emerson as a key enabler of next‑generation aerospace testing.