CAJ | 학술논문

为使多波束测深系统获得高质量的海底地貌图像，研究一种基于多波束相干原理的成像方法。在分析多波束相干算法估计海底回波到达时间（ time of arrival， TOA）与到达方向（ direction of arrival， DOA）原理的基础上，结合水声环境与声呐系统参数对各检测点对应的反向散射强度和地理位置信息进行估计，并从相干信号的幅度、相关性以及频谱三方面对受噪声影响的相位差数据进行质量控制，实现了反向散射强度和空间位置信息的准确融合。试验数据的处理结果验证了该方法能有效抑制噪声对相位差序列的干扰并且所获声呐图像具有较好的空间分辨率。
위사다파속측심계통획득고질량적해저지모도상，연구일충기우다파속상간원리적성상방법。재분석다파속상간산법고계해저회파도체시간（ time of arrival， TOA）여도체방향（ direction of arrival， DOA）원리적기출상，결합수성배경여성눌계통삼수대각검측점대응적반향산사강도화지리위치신식진행고계，병종상간신호적폭도、상관성이급빈보삼방면대수조성영향적상위차수거진행질량공제，실현료반향산사강도화공간위치신식적준학융합。시험수거적처리결과험증료해방법능유효억제조성대상위차서렬적간우병차소획성눌도상구유교호적공간분변솔。
In order to obtain high-quality images of the seafloor geomorphology by using multibeam echo sounder, this paper researches the imaging method based on a multibeam interferometric principle. A multibeam interferomet-ric algorithm was analyzed to estimate the Time of Arrival ( TOA) and Direction of Arrival ( DOA) of the seafloor echo. Using the TOA and DOA values and the parameters of underwater acoustic environment and sonar system, the backscattering strengths and their ecological locations corresponding to seafloor detection points were estimated. As a result, the three aspects of the coherent signals, namely the amplitude, correlation and spectrum, were applied in quality control of the phase difference sequence affected by noise. This imaging method could achieve accurate fu-sion of backscattering strengths and their ecological locations on the spatial position. The processing results of the experiment data show that this method can effectively suppress noise disturbance to phase difference sequence. Also the sonar images have relatively good spatial resolution.