ABSTRACT

With the boom of communication systems on independent platforms (such as, airplanes and vessels), co-site interference has become prominent. Currently, extensive research has been conducted on the development of an adaptive co-site interference cancellation system (ACICS); however, the related interference cancellation bandwidth characteristics have not been adequately investigated, thereby critically restricting the further optimisation of the ACICS design. In this study, the bandwidth signal calculation formula of the ACICS interference cancellation ratio is derived, and the quantitative relationships among the interference cancellation bandwidth, interference cancellation ratio, system gain, and delay-matching degree are analysed exhaustively. The results reveal that the higher the required interference cancellation ratio, the smaller is the interference cancellation bandwidth; the interference cancellation bandwidth can be enhanced to a limited degree by increasing the system gain. Furthermore, the interference cancellation bandwidth and the delay-matching distance follow an approximately inverse relation, and the interference cancellation bandwidth can be improved by delay matching. The nearest matching method can be employed for broadband interference. Finally, the conducted simulations and experiments validate the correctness and effectiveness of the theoretical analysis.

摘要

随着独立平台（如飞机和船舶）上通信系统的蓬勃发展，同站干扰变得突出。目前，已经对自适应共址干扰消除系统（ACICS）的开发进行了广泛的研究；然而，相关的干扰消除带宽特性尚未得到充分研究，从而严重限制了 ACICS 设计的进一步优化。本研究推导了ACICS干扰抵消比的带宽信号计算公式，并详尽分析了干扰抵消带宽、干扰抵消比、系统增益和延迟匹配度之间的定量关系。结果表明，所需的干扰消除率越高，干扰消除带宽越小；通过增加系统增益，可以在有限程度上增强干扰消除带宽。此外，干扰消除带宽与延迟匹配距离呈近似反比关系，通过延迟匹配可以提高干扰消除带宽。宽带干扰可以采用最近匹配法。最后通过仿真和实验验证了理论分析的正确性和有效性。通过延迟匹配可以提高干扰消除带宽。宽带干扰可以采用最近匹配法。最后通过仿真和实验验证了理论分析的正确性和有效性。通过延迟匹配可以提高干扰消除带宽。宽带干扰可以采用最近匹配法。最后通过仿真和实验验证了理论分析的正确性和有效性。