Blind algorithm for calculating common poles based on linear prediction

The paper proposes a blind calculation method for the poles common to multiple signal transmission paths. In the field of room acoustics, the poles correspond to the mode frequencies that are determined by room size and shape, and they do not change when source and receiver locations change. Information on these acoustic poles is useful for many applications, including echo cancellation and sound field equalization in a room. Conventional pole estimation methods require a priori measurement of the room transfer functions. This paper proposes a new method for the blind calculation of the poles, where the poles are calculated solely from the observed signals. Simulation results show that the proposed algorithm provides precise estimates of the common poles.