摘要
在地球表面,GPS信号强度在-130dBm左右,容易受到干扰.其中最主要的一类干扰类型是连续波干扰,针对该问题,提出一种新的连续波干扰检测和抑制算法,该算法首先使用多级DFT变换检测连续波干扰,然后使用级联的IIR陷波器对干扰进行抑制.测试结果表明:在存在多个-81dBm连续波干扰的情况下,该方法能够在3s内进行检测和抑制,同时GPS接收机的载噪比损失小于3dB.
Abstract.. On the surface of the Earth, the GPS signal＇s strength is around --130 dBm. It＇s vulnerable to interference. And the most important types of interference are the continuous-wave interference. A new continuous- wave interference detection and suppression method is presented. First,this method uses multi-level DFT transform to detect continuous wave interference, and then uses the cascade IIR notch filter to suppress the interferences. Test results show that.. When there are --81 dBm continuous wave interferences, this method can detect and suppress these interferences in 3 s, and the GPS receiver＇s carrier to noise ratio＇s loss is less than 3 dB.
出处
《微电子学与计算机》
CSCD
北大核心
2013年第12期18-21,共4页
Microelectronics & Computer
基金
中国第二代卫星导航系统重大专项多模导航型基带芯片(GFZX03030204)
关键词
GPS接收机
连续波干扰
DFT
陷波器
. GPS receiver~ Continuous-wave Interferenee~ Db~ Notch Filter
