中文摘要：

针对L波段数字航空通信系统（L—DACS1）反向链路测距仪（DME）信号干扰正交频分复用（OFDM）接收机的问题，提出基于联合压缩感知与接收分集的干扰抑制方法。在地面基站各接收支路中，首先通过压缩感知重构DME干扰信号，随后将重构的DME信号在时域进行干扰消除，消除干扰后各支路信号最终通过最大比值合并提高OFDM解调器输出信噪比，以克服测距仪残留信号的影响。仿真结果表明：该方法可有效抑制DME信号的干扰，提高L—DACS1系统的可靠性。

英文摘要：

In order to mitigate the impact of DME（distance measure equipment） interference on OFDM（orthogonal frequency division multiplexing） receiver of reverse link for L-band digital aeronautical communications system 1 （L- DACS1）, a new interference suppression scheme of OFDM receiver is proposed based on joint compressed sensing and receiving diversity. Firstly, in ground station, compressed sensing method is used to reconstruct DME impulse interference in each receiving branch. Then, the reconstructed DME interference is eliminated from the received signals in the time-domain. Finally, maximum ration combining method is utilized to overcome the residual DME interference and improve SNR of OFDM demodulator. Simulation results show that the proposed method can effectively suppress DME interference and improve the reliability of L-DACS1 system.