摘要
针对接收机在强干扰高动态环境难以定位导航的问题,提出基于惯导速度辅助卫星跟踪环路算法,通过惯导速度估算环路多普勒频移,压缩了环路需承载的动态范围,从而减少了环路等效噪声带宽,进而降低了跟踪环路带内干扰,提高了卫星接收机抗干扰能力。对提出算法的普适性、动态性、抗干扰性以及惯导估算误差影响等方面进行了仿真评估,仿真结果验证了算法的正确性,同时证明提出算法相比传统算法,载体运动加速度由91g提升至193g,同时抗干扰能力提升5~8 d B,可以容忍较大惯导辅助信息误差,为算法工程化奠定了基础。
In view that the receiver of inertial navigation system（INS） is hard to locate and navigate in high dynamic and noisy environment,an INS velocity-aided satellite tracking loop algorithm is proposed.The tracking loop＇s Doppler shift is estimated by INS velocity,which compresses the needed dynamic range of the tracking loop,thereby decreases the equivalent noise bandwidth of the loop,reduces the tracking loop in-band interference,and improves the anti-jamming ability of satellite receiver.Simulations are made to test the proposed algorithm＇s universality,dynamicity,anti-interference capacity and its influences on INS＇s estimation errors,and the results prove the correctness of the algorithm and show that the proposed algorithm upgrades the vehicle acceleration to 193 g compared to 91 g by traditional methods,improves the antiinterference ability by 5-8 d B,and can tolerate large estimation error of INS-aided information.These lay the foundation for the algorithm engineering.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2016年第3期330-336,共7页
Journal of Chinese Inertial Technology
基金
船舶预研支撑技术基金项目(14JZ3.9.2)
关键词
惯导速度辅助
高动态
抗干扰性
惯导辅助信息误差
inertial navigation system
velocity-aided
high dynamic
anti-jamming
INS-aided information error
