This paper describes a robust real-time blind speech separation method based on microphone array using delay-and-sum beamformer filter.

Simulations under a few different given errors demonstrate that the algorithm has better performance than other recursive beamformers, and has lower computational complexity.

There are so many kinds of beamformers in the smart antenna skills.

Adaptive filtering is the key technology of adaptive beamformer,which is a central part of smart antenna signal processing system, thestability and high precision of algorithm and running speed of hardwareare of the main standards to evaluate the performances of the system.

A digital beamformer in medical ultrasound imaging systems conventionally requires that the returning signals received by transducers are sampled at a rate significantly higher than the Nyquist rate.

In the many applications of doppler shift, precisely pointing the main axis of beam pattern of phaseshift beamformer is important.

By the complete investigation on the norm inequality constraint Capon beamformer(NICCB),the existence of its solution is analyzed in detail,the choice of the norm inequality constraint parameter for NICCB is analyzed and the selecting bound is given.