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Survey on self−interference suppression technologies for co−time co−frequency transmit−receive arrays
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Jian YANG1, 2, Mu YAN2, Changqing SONG2, 3, *, Dian XIAO2, 4, Chengzhe SHI2, 4, Shihai SHAO2, 4
Science & Technology Review | 2026, 44(1) : 102 - 115
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Science & Technology Review | 2026, 44(1): 102-115
• Papers •
Survey on self−interference suppression technologies for co−time co−frequency transmit−receive arrays
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Jian YANG1, 2, Mu YAN2, Changqing SONG2, 3, *, Dian XIAO2, 4, Chengzhe SHI2, 4, Shihai SHAO2, 4
Affiliations
  • 1School of Cyberspace Science and Technology, Beijing Institute of Technology, Beijing 100081, China
  • 2Laboratory of Electromagnetic Space Cognition and Intelligent Control Technology, Beijing 100089, China
  • 3College of Astronautics, Nanjing University of Aerospace and Astronautics, Nanjing 211106, China
  • 4National Key Laboratory of Wireless Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
Published: 2026-01-13 doi: 10.3981/j.issn.1000-7857.2025.05.00014
Outline
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Driven by dual demands of intensive frequency utilization in military electronic warfare equipment and high−spectral−efficiency communication in civilian devices, the co−time co−frequency transmit−receive array technology has become a research hotspot. However, this technology faces serious self−interference problems, which restricts its performance improvement. This review comprehensively synthesizes recent advancements in self−interference suppression techniques, covering interference coupling channels, spatial, analog, and digital domain mitigation strategies, and experimental validations. Current state−of−the−art demonstrates a transmit–receive isolation of 137.3 dB for a 256×256 transmit–receive separated array at a 26.4 GHz center frequency in China, and 140.5 dB for a 4×4 transmit–receive separated array at 2.45 GHz in America, approaching engineering viability. Nonetheless, the widespread adoption of large−scale multi−antenna systems in complex environments exposes these arrays to intense near−field multi−dimensional cross−coupling interference. Future research priorities should include elucidating near−field interference mechanisms, optimizing spatial degrees of freedom, simplifying analog domain processing, and refining non−ideal factor compensation models, thereby enabling practical deployment of this transformative technology.

co−time co−frequency transmit−receive arrays  /  self−interference suppression  /  spatial domain  /  analog domain  /  digital domain
Jian YANG, Mu YAN, Changqing SONG, Dian XIAO, Chengzhe SHI, Shihai SHAO. Survey on self−interference suppression technologies for co−time co−frequency transmit−receive arrays[J]. Science & Technology Review, 2026 , 44 (1) : 102 -115 . DOI: 10.3981/j.issn.1000-7857.2025.05.00014
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Article Info
doi: 10.3981/j.issn.1000-7857.2025.05.00014
  • Receive Date：2025-05-15
  • Online Date：2026-02-03
  • Published：2026-01-13
Article Data
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History
  • Received：2025-05-15
  • Revised：2025-07-19
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Affiliations
    1School of Cyberspace Science and Technology, Beijing Institute of Technology, Beijing 100081, China
    2Laboratory of Electromagnetic Space Cognition and Intelligent Control Technology, Beijing 100089, China
    3College of Astronautics, Nanjing University of Aerospace and Astronautics, Nanjing 211106, China
    4National Key Laboratory of Wireless Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
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