信道气流千扰下的关联成像研究

Correlation Imaging Research Under Disturbance of Channel Airflow

风导致的信道气流是影响关联成像的重要因素,因此,对信道气流干扰下的关联成像研究进行了总结。首先,给出了近场气流影响的相位模型,并从光传输和关联成像两个角度进行了可靠性验证;然后,将该模型扩展到高风速区域,得到超声速气流下风速和边界层厚度对关联成像的影响规律,定量分析了成像质量的变化情况;最后,针对实际成像过程中的探测抖动问题,介绍了基于关联成像时间特性的抑制方法以及小样本成像算法。本研究结果不仅可以评估信道气流对关联成像的影响,还为关联成像在机载遥感等领域的应用提供了重要的参考价值。

The channel airflow caused by wind is an important influencing factor for correlation imaging.Therefore,this paper summarizes the correlation imaging research under the disturbance of channel airflow.First,the phase model affected by the near field airflow is given,and the effectiveness of the model is verified from the perspectives of optical transmission and correlation imaging.Then,the model is extended to high wind speed regions,the influence law of wind speed and boundary layer thickness under supersonic arflow on correlation imaging is obtained,and the change of imaging quality is quantitatively analyzed.Finally,aiming at the problem of detection jitter in the actual imaging process,the suppression method based on the correlation imaging time characteristic and the small sample imaging algorithm are introduced.The results can not only evaluate the influence of channel airflow on correlation imaging,but also provide important reference value for the application of correlation imaging in airborne remote sensing and other fields.