摘要
为解决传统非相干累加算法难以克服的数据比特反转与平方损失问题,针对低信噪比GPS信号C/A码捕获,研究一种基于相干结果差分共轭乘累加的检测统计方法,实现了相干累加时间的延拓与增益的提高.仿真实验结果表明:在同等条件下捕获-175 dBW信号时,该算法性能明显优于非相干累加算法,可获得约2 dB增益.
To resolve the problems of GPS date bit transition and square loss,an improved differential correlation multiply integration algorithm was introduced for GPS C/A code under low signal to noise ratio.Simultaneity acquisition time and integration gain request were balanced.Simulation results show that the performance of the proposed algorithm is better than that of non-coherent correlation algorithm,which can get about 2dB gain when capturing the signal-175dBW under the same condition.
出处
《大连海事大学学报》
CAS
CSCD
北大核心
2010年第3期69-71,82,共4页
Journal of Dalian Maritime University
基金
江苏省科技创新与成果转化项目(BE2008096)
关键词
全球定位系统(GPS)信号
低信噪比
捕获算法
共轭乘累加
global positioning system（GPS）signal
low SNR
acquisition algorithm
correlation multiply integration
