An Experimental Digital Beamforming Sonar
Previous experimental results using a 250-kHz acoustic imaging system show the Potential usefulness of holographic processing in high resolution sonars 1,2 This paper presents the design and preliminary experimental results of a holographic sonar using a linear array, As presently configured, the system consists of a 128-element line array, a single preamplifier/sine-cosine channel, a cylindrical acoustic projector, an Altair 8800 digital microcomputer, and an HP 1335A storage display.
KeywordsFast Fourier Transform Discrete Fourier Transform Preliminary Experimental Result Variable Gain Amplifier Azimuth Resolution
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