›› 2012, Vol. 32 ›› Issue (6): 54-61.doi: 10.3780/j.issn.1000-758X.2012.06.008

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FX Correlation Scheme and Improvement on Delete Algorithm

 LU  Wei-Tao, YANG  Wen-Ge, HONG  Jia-Cai, SHI  Xue-Shu   

  1. (The Academy of Equipment,PLA,Beijing101416)
  • Received:2012-05-07 Revised:2012-07-15 Online:2012-12-25 Published:2012-12-25

Abstract: Based on the analysis of the FX correlation in interferometry technology such as VLBI,a novel FX correlation scheme was proposed.The new scheme reduced the timedelay between different station signals to less than one bit by compensating the integer bit timedelay twice,which avoided phase wrapping and omitted fraction compensation.Then,analysis on the new scheme was made,including correlation length and computational complexity.In addition,an outlier delete algorithm was mended,which made the delete procedure unaffected by the trend phase change according to the frequency.Monte Caro simulation and CE-2 satellite measured data processing results prove the validity and effectiveness of the improvements.

Key words: Interferometry technology, Correlation, Timedelay estimation, Phase wrapping, Outlier delete, Deep space exploration