振荡器相位噪声对双站SAR成像影响分析

Analysis of Oscillator Phase Noise Effects on Bistatic SAR Imaging

研究了振荡器的相位噪声对双站SAR系统成像的影响.根据振荡器的相位噪声的幂律模型,给出了双站SAR回波相位误差模型影响及其与单站模型的差异,基于相位噪声变化快慢对成像影响的差异,将其划分成线性误差、二次相位误差和高频误差三种分量,分别定量分析了它们对双站SAR图像偏移、聚焦及副瓣特性的影响.

This paper discussed the effects of oscillator noise on bistatic SAR imaging. In terms of the power order model of oscillator phase noise, the bistatic ＆ monostatic phase errors and the difference between them were addressed. Then, based on the effects diversities with the phase errors changing rate, the errors were divided into three parts, i.e. linear phase errors, quadratic phase errors and wideband high frequency errors. Quantitative estimates of image offset, focusing and side lobe performance, were investigated.