Circularly moving sensor for use of modulation effect

A novel sensing architecture with a single sensor that allows estimation of the Direction Of Arrival (DOA) of a signal is proposed. The key idea is to move the sensor in a circular path to cause a phase modulation in the signal so that the observed signal has the DOA information in its message. The DOA can be estimated by demodulating the observed signal. The paper shows that the proposed method theoretically derives the DOA in an analytical form with continuous sampling. Simulation results of a more realistic discrete-time procedure illustrate the proposed architecture is able to provide a valid estimation from a sinusoidal signal with additive noise.