【摘要】 传统声呐系统通常将全阵波束形成结果直接送显输出,且全阵波束处理往往未有效利用信号的相关性,针对此特点,本文结合平滑相干变换(SmoothedCoherenceTransform,SCOT)处理原理,提出一种基于SCOT预白化处理的分裂孔径波束形成处理方法。该方法首先将阵列孔径一分为二,其次对两子孔径波束输出进行SCOT、互谱处理,最后获得最终的波束输出。与常规全阵波束处理方法相比,本文所提出的方法能有效抑制高噪声频率成分,同时提高目标的方位分辨能力。仿真结果表明,该方法能有效改善波束的输出效果。更多还原

【Abstract】 Traditional sonar systems tend to directly display and output to send the results of full-array beamforming. The full-array beam processing does not make effective use of signal correlation. In view of this feature, this paper proposes a split aperture beamforming processing method based on Smoothed Coherence Transform(SCOT) pre-whitening processing principles. This method first divides the array aperture into two, and then performs SCOT and cross-spectrum processing on the output of the two sub-aperture beams. Finally, it obtains the final beam output. Compared with the conventional full-array beam processing method, the method proposed in this paper can effectively suppress high-noise frequency components while improving the target’s azimuth resolution ability. The simulation results show that this method can effectively improve the beam output effect.更多还原