机载导航设备中基于自适应对消的DME脉冲干扰抑制方法  

DME Pulse Interference Suppression Method Based on Adaptive Cancellation for Airborne Navigation Equipment

作　　者：方伟[1,2] 王文益[2] 卢丹[2] 胡铁乔[2] 

机构地区：[1]天津大学电子信息工程学院,天津300072 [2]中国民航大学智能信号与图像处理天津市重点实验室,天津300300

出　　处：《南开大学学报（自然科学版）》2014年第2期24-29,共6页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(61172112;61271404);国家自然科学基金委员会与中国民用航空局联合项目(61179064);天津市科技支撑计划重点项目(10ZCKFGX04000);中央高校基本科研项目(ZXH2009A003;ZXH2010D012;ZXH2012M006)

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GPS L5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.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.

关 键 词：测距仪 脉冲干扰 自适应对消 

分 类 号：V249.32[航空宇航科学与技术—飞行器设计]