Article Details

Abstract

As a key component of an underwater multibeam sounding system, the performance of underwater sounding algorithm directly affects the accuracy and reliability of the sounding system. To solve the problem of large errors in the amplitude method and phase difference method near the center beam and edge beam, this paper proposes an amplitude-phase joint sounding algorithm. During the sounding process, this algorithm can automatically switch algorithms based on the angle size of the echo signal. The WMT detection method is used when the angle is less than 15°, and phase difference method is used when the angle is greater than 15°. This algorithm compensates for the shortcoming that a single algorithm has large error near the center beam and edge beam, and improves the accuracy of the system at different sounding angles. In addition, it is difficult for traditional single core DSP to complete the processing of underwater sounding algorithm in real time. Therefore, based on TMS320C6678 DSP chip, this paper uses the method of master-slave model to complete the engineering implementation of amplitude-phase joint sounding algorithm using the DSP's five cores, meeting the real-time requirements of system.

Keywords

underwater sounding; Digital Signal Processing; amplitude-phase joint sounding

References

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About the authors

Jia Huaichang (1999-), male, Han ethnicity, from Huining, Gansu, holds a master's degree and specializes in underwater signal processing.