How to Conduct Angle of Arrival Testing
Creating Phase Coherent, Time-Aligned Outputs with A Signal Generator
Accurately emulating an angle-of-arrival (AoA) scenario requires generating multiple phase-coherent signals that reach different antennas with precise phase and timing relationships. In a real-world AoA setup, a receiver determines the direction of a signal from the phase or time offset observed across multiple antennas. Using multiple single-channel signal generators to emulate this environment is challenging, as it requires meticulous calibration to ensure the signals remain both phase-coherent and time-aligned. These calibration demands make accurate and repeatable AoA testing difficult.
An integrated multi-channel signal generation architecture with a shared reference and internal timing control enables phase-coherent operation across all channels, maintaining constant relative phase over time and temperature. Built-in synchronization allows all channels to trigger simultaneously and maintain phase alignment, eliminating the need for complex external cabling and manual calibration. This design delivers stable, repeatable phase and timing relationships essential for accurate AoA emulation.
Angle of Arrival Testing Solution
Accurate angle-of-arrival (AoA) testing demands multiple signals that remain precisely phase- and time-aligned across all channels. The Keysight MXG signal generator simplifies this by providing up to four fully synchronized outputs that share a common clock reference. This architecture reduces phase drift and maintains coherence even during frequency changes, while a global trigger ensures simultaneous event timing.
The result is stable, repeatable AoA emulation without the complexity of external synchronization. Traditional multi-source setups require extensive calibration to achieve this level of precision, but the MXG’s integrated design makes it simple to adjust the phase of each signal and achieve alignment.
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N5186A MXG Vector Signal Generator
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