CAJ | 학술논문

载波时延整周模糊解算是目前连线干涉测量（connected elements interferometry ，CEI）中的瓶颈问题。针对扩频信号、数传信号等常见的航天器信号类型，提出了基于宽带信号相关处理的连线干涉测量方案。该方案首先通过对宽带信号进行相关处理得到群时延信息；然后再进行载波提取得到载波差分相位信息；最后以群时延进行载波时延整周模糊解算，实现CEI测量。理论分析和仿真结果表明了所提方案的正确性，并对嫦娥二号宽带数据进行处理，得到了载波时延估计，精度较群时延提高了24 dB。
재파시연정주모호해산시목전련선간섭측량（connected elements interferometry ，CEI）중적병경문제。침대확빈신호、수전신호등상견적항천기신호류형，제출료기우관대신호상관처리적련선간섭측량방안。해방안수선통과대관대신호진행상관처리득도군시연신식；연후재진행재파제취득도재파차분상위신식；최후이군시연진행재파시연정주모호해산，실현CEI측량。이론분석화방진결과표명료소제방안적정학성，병대항아이호관대수거진행처리，득도료재파시연고계，정도교군시연제고료24 dB。
Ambiguity resolving of carrier delay is a bottleneck problem in connected elements in-terferomstry(CEI)presently .In view of the common signal type of spacecraft ,such as spread spec-trum signal and data-transmission signal ,a CEI scheme based on wideband correlation processing is proposed .The scheme firstly obtains group delay by wideband correlation processing ,then carrier difference phase is estimated after carrier extraction ,and finally carrier delay ambiguity is resolved by using the group delay ,when the CEI is realized .Theoretical analysis and simulation results show the validity of the proposed scheme ,moreover ,the CE-2 data is processed and carrier delay estimation is obtained ,accuracy of which is improved by 24 dB ,compared with that of group delay .