Weighted Frequency Subband Compounding in Ultrasonic Imaging Sensor Consisting of a Single Transducer and a Random Coding Mask

This paper presents a study of ultrasound imaging of single elements using a randomly coded mask produced using finite element method software. A weighted frequency subband compounding method is proposed to improve the resolution in the range and lateral directions. The echo signal was split into a number of narrow frequency subbands. The target image was constructed by solving a linear equation for the model. The effects of the subband widths on the image resolution were also studied.