A command driven DSP hardware for DOA estimation

Techniques for the localization and tracking of noise sources in the ocean using passive listening mechanisms are being evolved by estimating the direction of arrival of the noise waveform at two or more distinct positions using buoy systems. This paper introduces a command driven signal processing hardware for obtaining the direction of arrival of noise waveforms emanating from the target under consideration, working concurrently with a 20 element hydrophone array, which is mechanically steered by a hydrophone array controller. This subsystem computes the signal power of a source, within a user selectable band of frequencies. The hardware can be set for various gains, bandwidths and integration cycles.