摘要
关于北斗卫星导航系统信号检测优化问题,由于北斗卫星导航系统信号采用二次编码调制,无法使用传统的多周期相干积分算法来提高信号检测性能。为提高检测精度,提出一种应用于北斗卫星导航接收机中的类相干积分算法,使用多条支路,分别对不同的相位翻转组合进行积分,然后取其中的最大值作为以上类相干积分的结果,最后进行检测。对改进算法模型及误差进行了理论分析,并通过仿真结果表明在相同的检测时间和虚警概率条件下,相比传统算法提高了检测概率。
Because of the BeiDou satellite navigation signal＇s secondary code, the traditional multi-cycle coherent integration algorithm cannot be used to improve the performance of signal detection. In this paper a semi-coherent in- tegration algorithm was proposed and applied to the BeiDou satellite navigation receiver. In this scheme, coherent in- tegration in multiple branches with different signal phase was process, and then one of the maximum value was taken as a result of the semi-coherent integration： This algorithm was analyzed theoretically in this paper, and the simula- tion results show that it has higher detection probability while the same false alarm prnbability.
出处
《计算机仿真》
CSCD
北大核心
2013年第11期46-49,142,共5页
Computer Simulation
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(2011 GFZX03030204)
关键词
北斗卫星导航系统
类相干积分
检测概率
Beidou navigation satellite system
Semi-coherent integration
Detection probability
