摘要
文中提出了一种双级伪码捕获方案一"匹配滤波+滑动相关"模式,利用前/后两级捕获方法分别对链接序列的内部序列(MCCS序列)和外部序列(GOLD序列)分别进行捕获。仿真结果证明:双级捕获方案的捕获实时性得到了明显的提升,较单级捕获方案捕获所需实践降低1个数量级,且当信噪比大于10dB时均可正常工作。
To improve the performance of multi-path interference suppression,a novel complex system using the modified complete complementary series(MCCS)as inner sequence is put forward in this paper to substitute the complex system using m_W series.Because of the longer period of the concatenated sequence,the periods of code acquisition is very long which debase the real-timing characteristic.In accordance with the novel concatenated sequence,the two-stage fast code acquisition scheme in the receiver has been discussed in detail.Meanwhile.the sysrem have been simulated and proved the properties of acquisition speed,and the system can run normally when the SNR met hold is 10dB.
出处
《弹箭与制导学报》
CSCD
北大核心
2006年第S8期746-749,共4页
Journal of Projectiles,Rockets,Missiles and Guidance
基金
高等学校博士学科点专项科研基金资助课题(20050217016)
关键词
复合系统
链接序列
修正完备互补序列(MCCS)
双级捕获
complex system
concatenated sequence
modified complete complementary series(MCCS)
two-stage fast code acquisition scheme
