摘要
针对多波束测深声呐相位差检测法中噪声严重影响相位差估计的质量,使得深度测量的数据出现偏差的问题,采用理论分析和计算机仿真的方法,研究了噪声干扰对相位差估计的影响并有针对性地提出了减小测量误差.提高深度测量的可信度的信号处理方法.研究结果表明,噪声对相位差测量的影响在接收条带的不同部分是不同的,采用较大的子阵间距,利用相干信号的幅度信息和使用带宽可变的滤波器能有效降低噪声干扰,提高相位差估计的精度,实测数据处理证实了信号处理方法的有效性和可行性.
In considering the problem of the precision of phase difference estimation and the quality of the bathymetric data being seriously influenced by noise interference,theoretic analysis and computer simulation were used to study the impact of the noise on phase difference estimation,and useful signal processing methods were proposed to decrease measurement bias and increase the reliability of sonar systems.The results indicate that noise influence on phase difference is not the same in different parts of one bathymetric swath.Using wide subarray spacing,the information of signal amplitude and variable bandwidth filtering can decrease the noise and improve the phase difference estimation precision.The signal processing methods are illustrated by data from a 300 kHz multibeam echo sounder.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2011年第5期632-636,共5页
Journal of Harbin Engineering University
基金
国家863海洋技术领域目标引导类项目(2007AA09Z124)
国家自然科学基金资助项目(41006057
41076056
60872107)
国家科技部国际合作项目(2008DFR70320)
中国高等学校博士点基金项目(20092304110010)
水声技术国防重点实验室基金项目(91407200302100C20059
140C200403110C20)
关键词
相位差
噪声干扰
测量误差
多波束测深声呐
phase difference
noise interference
measurement error
multibeam bathymetric sonar
