中文摘要：

GPSL5信号作为GSP现代化的一部分，是专为民用航空而设置的，它与我国北斗星导航系统所用的B2a信号共用同一频段，共同组成未来的全球导航卫星系统（GNSS）.L5信号面临已有航空无线电设备的干扰，其中测距仪设备（DME）对GPSL5和B2a信号所在频段造成了不可忽视的脉冲干扰．提出一种基于自适应对消的DME干扰抑制方法，充分利用机载DME天线所接收到的信息，对机载GPS接收机中的DME干扰进行估计和重构，进而进行抑制，避免了传统方法造成的数据损失问题．

英文摘要：

As a part of modernization of GPS, L5 is set for civil aviation exclusively. GPS L5 signal, together with Compass B2a signal, are important parts of Global Navigation Satel- lite System （GNSS）. However, L5 signal is facing severe interference from existing aeronauti- cal radio equipment, among which Distance Measuring Equipment （DME） makes great influ- ence on the frequency band of L5 and B2a signal. A new DME interference suppression ap- proach is proposed based on adaptive cancellation. This method can fully use the information received by DME antenna, then estimate and reconstruct the DME signal received by GPS re- ceiver, and then suppress the interference, which can solve the problem of missing data caused by conventional methods.