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Emerson has introduced a software-based approach to validating aerospace communication systems, aiming to shift more RF testing from field environments into controlled lab settings. The NI Channel Emulator System Software (CHESS) platform was presented at the 2026 Space Symposium in Colorado.

For eeNews Europe readers working on satellite and aerospace communications, the development highlights a potential shift in how RF validation is approached, particularly as system complexity increases and field testing becomes more constrained.

Software-defined RF channel emulation for aerospace systems

At the core of the announcement is NI CHESS, a platform designed for RF channel emulation that operates alongside NI PXI Vector Signal Transceiver hardware. It enables engineers to replicate dynamic radio environments in real time, covering scenarios such as ground-to-orbit and airborne communication links.

The system combines model-based simulation with hardware-in-the-loop execution, allowing real-time injection of RF impairments including Doppler shift, multipath fading, path loss and interference. These effects are processed using FPGA-based co-processing and integrated with third-party scenario tools.

This approach could allow earlier identification of performance issues, potentially reducing reliance on costly and logistically complex field tests. By enabling repeatable lab-based validation, engineers may be able to refine system behaviour before deployment.

Addressing complexity and test scalability

As aerospace communication systems evolve, test requirements are becoming more demanding. Traditional validation methods often rely on simplified channel models, which may not fully reflect real-world conditions. Emerson positions its RF channel emulation platform as a way to address this gap by delivering more realistic and adaptable test scenarios.

The platform supports multi-channel, wideband configurations, which may help accommodate more advanced satellite and defence systems without requiring significant redesign of existing test setups. Its software-based architecture also allows integration with existing PXI infrastructure, which could simplify deployment and extend the lifespan of current lab investments.

“Modern aerospace communication systems are becoming more complex, while field testing is increasingly expensive and constrained. NI CHESS gives engineers a practical way to validate mission-critical RF performance early and often using true-to-life conditions in the lab so teams can move faster, reduce risk and control costs without compromising realism,” said Chris Behnke, director for aerospace and defense RF test and validation systems at Emerson.

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