An Adaptive Algorithm for Amplitude and Phase Measurements Based on Multiple Sampling

Precise amplitude and phase measurement of a narrowband signal is required in many practical applications related to underwater sensing, navigation, and positioning. Existing methods or algorithms of phase and amplitude measurement such as in-phase and in-quadrature detection or quadrature sampling are useful, but lack capabilities to adapt to changing conditions. To overcome this limitation, we propose an adaptive algorithm based on multiple sampling that allows modification of certain parameters in response to changing conditions.