CAJ | 학술논문

在毫米波综合孔径成像中,当处理对象是扩展源时,得到的图像存在着条纹现象。提出了一种改进的CLEAN算法,将经过窗函数加权的阵列点散布函数用于CLEAN算法的解卷积过程。仿真结果表明,采用该算法对被点散布函数副瓣和噪声污染的毫米波综合孔径图像进行重建时,图像质量得到了进一步改善。
재호미파종합공경성상중,당처리대상시확전원시,득도적도상존재착조문현상。제출료일충개진적CLEAN산법,장경과창함수가권적진렬점산포함수용우CLEAN산법적해권적과정。방진결과표명,채용해산법대피점산포함수부판화조성오염적호미파종합공경도상진행중건시,도상질량득도료진일보개선。
In mm-wave synthetic aperture array imaging,additional strip phenomenon occur when processing extended source.An improved CLEAN Algorithm for image reconstruction is introduced.By weighting the Point Spread Function(PSF) of the array with window matrix which is constructed according to the MSE of residual dirty graph dynamically,the side lobe of dirty pulse used in CLEAN algorithm for deconvolution is adjusted dynamically.Simulation results show that the improved CLEAN algorithm can improve image quality when it used to reconstruct dirty image polluted by the side lobe and noise.