As the interference bandwidth increases, the impact of interference coupling path dispersion on the cancellation performance can no longer be ignored in open space. Especially for the radio frequency interference adaptive cancellation system (RFIACS), the impact will be more serious. In response to this problem, this study establishes the time-domain model of a wideband RFIACS considering interference coupling path dispersion characteristics, and analyses the stability, convergence speed, interference cancellation ratio (ICR), and cancellation bandwidth of RFIACS considering dispersion characteristics. And the authors define the speed factor to characterise the convergence speed. The analysis shows that the dispersion of the interference coupling path will not affect the stability of the system, but will reduce the convergence speed and ICR. The larger the interference coupling path dispersion, the lower the convergence speed, and the larger the cancellation bandwidth, the lower the ICR. The experimental results verify the theoretical analysis.

中文翻译：

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宽带干扰耦合路径色散对射频干扰自适应抵消系统性能的影响

随着干扰带宽的增加，在开放空间中，干扰耦合路径色散对消除性能的影响将不再被忽略。特别是对于射频干扰自适应抵消系统（RFIACS），影响将更加严重。针对这一问题，本研究建立了考虑干扰耦合路径色散特性的宽带RFIACS时域模型，并分析了考虑色散特性的RFIACS的稳定性，收敛速度，干扰消除率（ICR）和消除带宽。作者定义了速度因子来表征收敛速度。分析表明，干扰耦合路径的分散不会影响系统的稳定性，但会降低收敛速度和ICR。干扰耦合路径的色散越大，收敛速度越低，抵消带宽越大，ICR越低。实验结果验证了理论分析。