在发射连续窄带噪声的相关声呐中,为了使相关输出不受回波相位起伏的影响,可以采用分段相关器。不同于常用的差频相关器,分段相关器中没有带通滤波器,因而便于在数字化系统中使用。本文导出模拟和极性分段相关器输出信噪比表达式,并给出确定段数和段长的基本原则。按照这些原则设计的分段相关器已成功地应用在实际系统中,取得了满意的结果。 In a correlated sonar emitting continuous narrow-band noise, a piecewise correlator may be used in order to keep the associated output unaffected by echoes of the echoes. Unlike the common beat correlator, there is no bandpass filter in the segmented correlator, making it easy to use in digitized systems. In this paper, the expression of signal-to-noise ratio of analog and polar segmentation correlator is derived and the basic principle of determining the number of segments and segment length is given. The segmented correlator designed according to these principles has been successfully applied in practical systems and has achieved satisfactory results.