Volume 12 Issue 6
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LIU Xinghua, WANG Guoyu, XU Zhenhai, et al. Review of principles, development and technical implementation of coherently combining distributed apertures[J].Journal of Radars, 2023, 12(6): 1229–1248. doi: 10.12000/JR23195
Citation: LIU Xinghua, WANG Guoyu, XU Zhenhai, et al. Review of principles, development and technical implementation of coherently combining distributed apertures[J].Journal of Radars, 2023, 12(6): 1229–1248. doi: 10.12000/JR23195
shu

Review of Principles, Development and Technical Implementation of Coherently Combining Distributed Apertures

DOI: 10.12000/JR23195
  • 1.

    State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics & Information System, Luoyang 471003, China

  • 2.

    Center for Information Research, Academy of Military Sciences, Beijing 100142, China

  • 3.

    State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics & Information System, National University of Defense Technology, Changsha 410073, China

  • 4.

    Beihang University, Beijing 100191, China

Funds:  The Postdoctoral Science Foundation of China (2023M734290)
More Information
  • Corresponding author: LIU Xinghua, xinghua217@163.com
  • Received Date: 2023-10-07
  • Rev Recd Date: 2023-11-19
    • Available Online: 2023-11-22
  • Publish Date: 2023-12-12
    Abstract
  • Coherently combining distributed apertures adjusts the transmitted/received signals of multiple distributed small apertures, allowing coordinated distributed systems to obtain high power aperture products at much lower cost than large aperture. This is a promising and viable technology as an alternative to using large apertures. This study describes the concept and principles of coherently combining distributed apertures. Depending on whether external signal inputs at the combination destination are necessary, the implementation architecture of coherent combination is classified into two categories: closed- and open-loop. The development of coherently combining distributed apertures and their application in fields such as missile defense, deep space telemetry control, radar detection over ultralong range, and radio astronomy are then comprehensively presented. Furthermore, key techniques for aligning the time and phase of the transmitted/received signals for each aperture are elaborated, which are also necessary for coherently combining distributed apertures, including high-precision distributed time-frequency transfer and synchronization, and coherently combining parameters estimation, measurement and calibration, and prediction. Finally, summary is presented, and the scope of future works in this field is explored.

     

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