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DME interference mitigation for LDACS1 based on decision-directed noise estimation

机译:基于决策噪声估计的LDACS1的DME干扰减轻

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L-band digital aeronautical communication system type 1 (LDACS1), a broadband system based on Orthogonal Frequency-Division Multiplexing (OFDM) is the most promising candidate for the future air-to-ground (A/G) communications. LDACS1 is operating as an inlay system and limited to the 500 kHz spectral gap between the two adjacent distance measuring equipment (DME) channels of bandwidth 1 MHz. In this paper, a decision directed noise estimation (DDNE) approach to mitigating the pulsed interference from DME for LDACS1 system is proposed. The proposed method removes the effect of inter-carrier interference (ICI) which is a major problem with the conventional pulse blanking method for LDACS1 system. The simulation results highlight the impact of DME interference onto the LDACS1 system and show the performance improvement of the proposed method compared to conventional interference mitigation methods in terms of bit error rate (BER).
机译:L波段数字航空通信系统1(LDACS1),基于正交频分复用(OFDM)的宽带系统是未来空对地(A / G)通信最有前途的候选者。 LDACS1作为镶嵌系统运行,并限于带宽1 MHz的两个相邻距离测量设备(DME)通道之间的500 kHz光谱间隙。在本文中,提出了一种决策指导噪声估计(DDNE)方法来缓解来自LDACS1系统的DME的脉冲干扰。所提出的方法消除了载波间干扰(ICI)的效果,这是LDACS1系统的传统脉冲消隐方法的一个主要问题。仿真结果突出了DME干扰对LDACS1系统的影响,并显示了与误码率(BER)方面的传统干扰缓解方法相比所提出的方法的性能改进。

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