基于DSP的幅度-相位联合测深算法设计与实现  

Design and Implementation of Amplitude-phase Joint Sounding Algorithm Based on DSP

作　　者：贾怀昌 杨成竹 JIA Huaichang;YANG Chengzhu(School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学信息与电子学院,北京100081

出　　处：《现代信息科技》2025年第5期129-133,共5页Modern Information Technology

摘　　要：作为水下多波束测深系统的关键部分,水下测深算法的性能直接影响测深系统的精确性和可靠性。为解决幅度法和相位差法在中心波束附近和边缘波束附近存在较大误差的问题,文章提出一种幅度-相位联合测深算法。该算法在测深过程中,能够根据回波信号的角度大小自动切换算法:当角度小于15°时,采用WMT检测法;当角度大于15°时,采用相位差法。该算法弥补了单一算法在中心波束和边缘波束附近误差较大的缺点,提高了系统在不同测深角度下的准确性。此外,传统单核DSP难以实时完成水下测深算法处理,因此,基于TMS320C6678 DSP芯片,采用主从模型方式,利用其5个核完成了幅度-相位联合测深算法的工程实现,满足了系统的实时性要求。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.

关 键 词：水下测深 数字信号处理 幅度-相位联合测深 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]