惯性加速度辅助卫星接收机跟踪环路算法
INS Acceleration-Aided Satellite Receiver Tracking Loop Algorithm

针对卫星接收机在强干扰高动态环境难以定位导航的问题, 提出了基于惯性加速度辅助卫星跟踪环路算法, 通过惯性加速度估算环路多普勒频移变化率, 压缩了环路需承载的动态性, 从而减少环路等效噪声带宽, 降低了跟踪环路带内干扰, 提高卫星接收机抗干扰能力．对所提算法的普适性、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, 同时证明所提算法相比传统算法动态性大大提升, 抗干扰能力提升5～8 dB, 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．
As the satellite receiver has problems in positioning and navigating in high dynamic and noisy environment，inertial navigation system(INS)acceleration-aided satellite tracking loop algorithm was proposed. The tracking loop Doppler slope was estimated by INS acceleration，which compressed the dynamic range that the tracking loop holds. Thereby，the equivalent noise bandwidth of the loop was reduced，resulting in the reduction of tracking loop in-band interference and the improvement of satellite receiver anti-jamming capacity. The universal，dynamic，interference and INS estimating error impact of the proposed algorithm was simulated. The simulation results verified the correctness of the algorithm，and proved that the proposed algorithm could largely enhance the dynamic performance compared to traditional methods，and the anti-interference ability could be enhanced to 5―8 dB. The simulation results also verified that the proposed algorithm could tolerate large INS-aided information estimating error，which lays the foundation for the algorithm engineering