A new framework that enables the estimation of the AoA of signal paths from signal sources (both active transmitters and passive objects), with only signal magnitude measurements.
The use of Radio Frequency (RF) signals to gather information about our surroundings has been of increasing interest. Angle of Arrival (AoA) estimation is, in particular, an important problem with many applications in localization and tracking. Current Angle of Arrival (AoA) estimation approaches (e.g., MUSIC, and ESPRIT), however, rely on the use of synchronized phase information which is unavailable in most WiFi/Bluetooth receivers, and is challenging to achieve in a synthetic antenna array. If AoA can be estimated with only received signal magnitude, this can then open up room for many new possibilities.
Researchers at the University of California, Santa Barbara have created a new framework that enables the estimation of the AoA of signal paths from signal sources (both active transmitters and passive objects), with only signal magnitude measurements. Their methodology is based on their new proposed analysis on the power spectrum of the received signal magnitude. This invention enables AoA estimation using only signal magnitude, and does not require phase information. This approach creates new possibilities for many FR applications. For instance, as the inventors have shown, this framework enables tracking active or passive moving targets, with only a couple of transceivers and their corresponding signal magnitude measurements. Overall, extensive experimentation of this invention in both indoor and outdoor areas confirm that AoA can be estimated, with a higher accuracy, with only the received signal magnitude measurements, and can be utilized for high quality localization and tracking.
Radio Frequency, AoA, Wifi, Bluetooth, Localization, Target tracking, Tracking, Head Counting, indmicroelec, indsoftw, indtelecom