A Radio Interferometry Processing Method Based on Wavelet Correlation Filter

Abstract

A radio interferometry method is proposed to resolve the problems of the process of weak spacecraft signal received in deep space exploration. Firstly，based on the analysis of the original wavelet correlation filter，an improved one is proposed which contains shift correlation，the processing order from higher scale to lower one and the threshold filtering of the highest scale coefficients. Secondly，the wide band signal model in deep space exploration is analyzed and constructed，and the radio interferometry scheme based on wavelet correlation filter is provided. Finally，results of Monte Carlo simulation and data processing for some GEO satellite measured signal prove a better performance of the interferometry measurement，and the group delay accuracy of the GEO satellite is improved by 10%.

Keywords

space exploration / radio interferometry / wavelet correlation filter / shift correlation

References

[1] 魏二虎,史青,严韦,等. ERP精度对“嫦娥一号”差分VLBI定位精度的影响[J]. 武汉大学学报(信息科学版),2011,36(11):1324-1327
WEI E H,SHI Q,YAN W,et al. Influence of ERP’s precision on CE-1’s positioning based on differential VLBI[J]. Geomartics and Information Science of Wuhan University,2011,36(11):1324-1327
[2] 唐歌实,韩松涛,陈略,等. 深空网干涉测量技术在“嫦娥3号”任务中应用分析[J]. 深空探测学报,2014,1(2):146-149
TANG G S,HAN S T,CHEN L,et al. Analysison interferometric tracking technology by China deep space network in the Chang’e-3 mission[J]. Journal of Deep Space Exploration,2014,1(2):146-149
[3] 孙靖,王美,平劲松. 利用VLBI技术进行深空航天器跟踪的仿真分析[J]. 深空探测学报,2014,1(3):226-229
SUN J,WANG M,PING J S. Simulations models and analyses on VLBI spacecraft tracking[J]. Journal of Deep Space Exploration,2014,1(3):226-229
[4] 韩松涛,唐歌实,曹建峰,等. 面向“CE-3号”软着陆过程的深空网干涉测量技术[J]. 深空探测学报,2015,2(2):120-124
HAN S T,TANG G S,CAO J F,et al. Application of interferometric tracking by China DSN in CE-3 soft landing[J]. Journal of Deep Space Exploration,2015,2(2):120-124
[5] 朱新颖,李春来,张洪波. 深空探测VLBI技术综述及我国的现状和发展[J]. 宇航学报,2010,31(8):1893-1899
ZHU X Y,LI C L,ZHANG H B. A survey of VLBI technique for deep space exploration and trend in China current situation and development[J]. Journal of Astronautics,2010,31(8):1893-1899
[6] KARDASHEV N S,KOVALEV Y Y,KELLERMANN K I. Radio astron:an Earth-space radio interferometer with a 350,000 km baseline[J]. The Radio Science Bulletin,2012,343:1-16
[7] 路伟涛,杨文革,洪家财,等. FX型相关处理方案及野值剔除算法[J]. 中国空间科学技术,2012,32(6):54-61
LU W T,YANG W G,HONG J C,et al. FX correlation scheme and improvement on delete algorithm[J]. Chinese Space Science and Technology,2012,32(6):54-61
[8] HU Y G,ZHOU J J,TANG J,et al. The application of complex wavelet transform to spectral signals background deduction[J]. Chromatographia,2013
[9] 孟晋丽,潘泉,张洪才. 基于相邻尺度积系数的半软阈值小波滤波[J]. 电子与信息学报,2007,29(7):1649-1652
MENG J L,PAN Q,ZHANG H C. Denoising by multiscale product coefficient semi-soft thresholding[J]. Journal of Electronics & Information Technology,2007,29(7):1649-1652
[10] YU L M，WHITE L B. Thresholding strategy in passive detection via wavelet filter banks [C]//2012 IEEE International Conference on Computer Science and Automation Engineering（CSAE）. Zhangjiajie，China[s.n.]：2012：387-391.
[11] 苏哲,许录平,王勇,等. 改进小波空域相关滤波的脉冲星微弱信号降噪[J]. 系统工程与电子技术,2010,32(12):2500-2506
SU Z,XU L P,WANG Y,et al. Pulsar weak signal denoising based on improved wavelet spatial correlation filtering[J]. Systems Engineering and Electronics,2010,32(12):2500-2506
[12] 潘泉,孟晋丽,张磊,等. 小波滤波方法及应用[J]. 电子与信息学报,2007,29(1):236-242
PAN Q,MENG J J L,ZHANG L,et al. Wavelet filtering method and its application[J]. Journal of Electronics & Information Technology,2007,29(1):236-242
[13] WITHKIN A P. Scale space filtering [EB/OL]. [2017-10-20]. http://citeseerx.ist.psu.edu/viewdoc/downdload?doi=10.1.1.81.118&rep=rep1&type=pdf.
[14] XU Y S,WEAVER J B,HEALY D M,et al. Wavelet transform domain filters:a spatially selective noise filtration technique[J]. IEEE Trans. on Image Processing,1994,3(6):747-758
[15] PAN Q,ZHANG L,DAI G Z,et al. Two denoising methods by wavelet transform[J]. IEEE Trans. on Signal Processing,1999,47(12):3401-3406
[16] 赵瑞珍,屈汉章,宋国乡. 基于小波系数区域相关性的阈值滤波算法[J]. 西安电子科技大学学报(自然科学版),2001,28(3):324-327
ZHAO R Z,QU H Z,SONG G X. A threshold filtering algorithm based on the region relativityof the wavelet coefficients[J]. Journal of Xidian University,2001,28(3):324-327
[17] 王敏君,熊邦书,黄丽贞,等. 基于小波尺度相关的图像清晰度判别方法[J]. 计算机系统应用,2010,19(8):164-167
WANG M J,XIONG B S,HUANG L Z,et al. Image definition evaluation method based on wavelet scale correlation[J]. Computer Systems & Applications,2010,19(8):164-167
[18] ZHANG L,BAO P. Denoising by spatial correlation thresholding[J]. IEEE Trans. on Circuits and Systems for Video Technology,2003,13(6):535-538
[19] 祝传广,邓喀中,范洪冬. 基于尺度空间相关的自适应小波滤波算法研究[J]. 苏州大学学报(自然科学版),2012,28(3):32-37
ZHU C G,DENG K Z,FAN H D. Adaptive wavelet threshold for signal denoising based on the scale space correlation[J]. Journal of Suzhou University Natural Science Edition,2012,28(3):32-37
[20] 路伟涛,杨文革,洪家财. 改进的小波空域相关滤波算法[J]. 吉林大学学报(工学版),2015,45(3):1005-1011
LU W T,YANG W G,HONG J C. Improved spatially selective noise filtration algorithm[J]. Journal of Jilin University(Engineering and Technology Edition),2015,45(3):1005-1011
[21] 向东阳,吴正国,胡文彪,等. 改进的小波变换系数相关去噪方法[J]. 振动、测试与诊断,2010,30(5):561-565
XIANG D Y,WU Z G,HU W B,et al. Improved denoising algorithm using correlation of wavelet coefficient[J]. Journal of Vibration Measurement & Diagnosis,2010,30(5):561-565
[22] SHU F C，ZHANG X，KONDO T. Development of correlator model for differential VLBI observations of satellites [C]// 2008 International Conference on Microwave and Millimeter Wave Technology，ICMMT2008 Proceeding. [S.l.]：IEEE Computer Society，2008.
[23] 齐国清,贾欣乐. 基于DFT相位的正弦波频率和初相的高精度估计方法[J]. 电子学报,2001,29(9):1164-1167
QI G Q,JIA X L. High-accuracy frequency and phase estimation of single-tone based on phase of DFT[J]. Acta Electronica Sinica,2001,29(9):1164-1167