Multichannel signal detection based on the transient beam-to-reference ratio

We present a multichannel signal detection approach that is particularly advantageous in nonstationary noise environments. A beamformer is realistically assumed to have a steering error, a blocking matrix that is unable to block all of the desired signal components, and a noise canceler that is adapted to the pseudostationary noise, but not modified during transient interference. Signal components are detected at the beamformer output based on a measure of their local nonstationarity, and discriminated from transient noise components based on the transient beam-to-reference ratio.