摘要
介绍了三阶载波跟踪环路的设计方法,并在MATLAB软件上通过低动态实验和高动态仿真实验对设计的跟踪环路性能进行验证。低动态实验采用中频信号采样器采集的真实GPS信号,高动态实验采用GPS信号仿真器生成的高动态仿真信号。实验结果表明,基于软件GPS接收机设计的二阶载波跟踪环路可满足一般低动态要求,而三阶载波环路则可满足载体相对于卫星加速度为10个g的高动态要求。
Third-order carrier tracking loop was designed based on the software GPS receiver. The performance of the tracking loop was evaluated on MATLAB through low dynamic experiment and high dynamic experiment. Real GPS signals collected by IF signal sampler were used in low dynamic experiment, and high dynamic simulating signal generated by signal simulator were used in high dynamic experiment. The experiment results show that the second-order loop based on software GPS receiver is feasible under low dynamic condition, and the third-order loop can meet the high dynamic requirement of 10g vehicle acceleration with respect to a satellite.
出处
《中国惯性技术学报》
EI
CSCD
2007年第6期682-685,共4页
Journal of Chinese Inertial Technology
基金
国家高技术研究发展计划项目(2006AA12Z319)
