How to Test Time of Flight of UWB Devices

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Signal Analyzer
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Signal Analyzer
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Making accurate proximity calculations between UWB devices

Accurate positioning is a fundamental feature of ultra-wideband (UWB) devices. The time-of-flight (ToF) measurement is essential in the test and validation process. The method ensures that the device under test (DUT) accurately reports the signal flight time, which is critical for precise distance calculations. ToF testing measures the distance between the initiator, which sends the signal, and the responder, which receives it. It verifies that the DUT’s reporting mechanism functions correctly and enables accurate proximity calculations between UWB devices.

Performing ToF measurements requires a high-precision test system to provide reliable and robust ranging timestamps. The test system must perform precise time measurements in either an over-the-air (OTA) or conducted environment. The test setup includes a test chamber for the OTA test, a vector transceiver for sending and receiving signals, and software for signal generation and analysis.

UWB ToF test solution

UWB ToF test solution

Accurately calculating the distance between UWB devices requires performing ToF measurements to verify that the DUT's reporting mechanism functions correctly. The Keysight ToF test solution consists of the Keysight M9415A VXT PXI vector transceiver, PathWave vector signal analysis software, X-Series measurement application, and PathWave signal generation software. The solution enables design engineers to perform a range of measurements on UWB devices, including frequency, time, and amplitude domain analysis, as well as antenna characterization and system-level testing.
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