非对称空间外差光谱仪自适应频率跟踪处理方法  

Adaptive Frequency Tracking Processing Method for Doppler Asymmetric Spatial Heterodyne Spectrometer

作　　者：彭翔[1] 张嵬[2] 

机构地区：[1]中国科学院光电技术研究所光电传感技术研究室,成都610209 [2]上海卫星工程研究所上海市深空探测技术重点实验室,上海201109

出　　处：《光子学报》2017年第3期157-164,共8页Acta Photonica Sinica

基　　金：国家重点基础研究发展计划(No.2014CB744204);上海市深空探测技术重点实验室开放课题(No.DS201501-003)资助~~

摘　　要：非对称空间外差光谱技术是一种新型的超高分辨率遥感探测技术,要求后期的数据处理技术也具有相应的超高准确度.从数字信号处理的角度,提出了一种自适应的频率跟踪处理方法,根据信号的空间频率来插值补偿信号的相位偏移,并且递归迭代出最接近真实值的相位信息.经仿真实验对比验证表明,在噪声干扰强度不大的条件下,相较于传统傅里叶变换方法,本文算法对信号频率和相位提取的准确度提高了约100倍以上,能够有效降低非对称空间外差光谱技术的系统误差.Doppler Asymmetric Spatial Heterodyne（DASH）spectroscopy is a new hyperspectral remote detection technology,which requires the data processing technology should also have corresponding super high precision.From the viewpoint of digital signal processing,an adaptive frequency tracking method was proposed,which is based on the spatial frequency of the signal to compensate the phase shift of the fringe signal,and recursive iterate to the phase information most close to the real value.Verified by simulation experiment contrast,the results show that,under the low intensity noise condition,the frequency tracking algorithm can improve the accuracy of signal frequency and phase extraction by about more than 100 times to compare with the traditional Fourier transform method,which proves it can effectively reduce the system error of DASH spectroscopy.

关 键 词：非对称空间外差光谱仪 数字信号处理 频率跟踪算法 迭代补偿 相位准确度 

分 类 号：O438.2[机械工程—光学工程]