Analysis and Simulation of Frost's Beamformer

Sensor arrays are often used for a signal sep- aration from noises using the information about the direc- tion of arrival. The aim of this paper is to analyze Frost's beamformer with respect to the speech preprocessing for the hearing impaired people. The frequency response of the sys- tem including the background noise attenuation are derived as functions of the direction of arrival. The derivation sup- poses a uniform linear array of sensors and plane waves. It is shown that the number of possible configurations can be decreased by using some symmetries. The impact of the used algorithm constraint on the frequency response and subse- quently on the directional noise suppression is derived ana- lytically.