Analysis of Acoustic Imaging of LFM-Capon Adaptive Beamforming Based on Sparse Array
This paper describes that ultrasonic imaging technology has been widely used in the detection of all walks of life with its characteristics of nondestructive and simple principle,but the quality of ultrasonic imaging needs to be improved,especially the horizontal resolution.It proposes an adaptive beamforming ultrasonic imaging method based on pseudo-random code modulated linear frequency modulation signal and sparse linear array.The Capon adaptive beamforming method is improved by combining the encoding excitation technique with the Capon algorithm and using the transmitted signal with pulse compression performance.Simulation results show that this method can improve the contrast and spatial resolution of imaging.
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