Angle of Arrival Accuracy Improvement

There’s new research from Department of Electrical and Information Engineering, Bari, Italy on A Linear Technique for Artifacts Correction and Compensation in Phase Interferometric Angle of Arrival Estimation that can be used with Bluetooth AoA Direction Finding.

The paper first discusses the main causes of error in AoA systems. This includes signal path length mismatches as avoided by the CoreHW AoA Hardware printed circuit board (PCB) tracks and mutual RF coupling effects that act on the antenna array.

The researchers devised and proved a technique to process IQ data to reduce systematic errors and first-order (linear) coupling effects. After a calibration phase they manged to reduce average absolute errors by more than a half in one test case more than a quarter in a second case.

Research on techniques such as this will make Bluetooth direction finding even more accurate.

Read about PrecisionRTLS™