电子学报2011，Vol.39Issue(2)：471-475,5.
互相关干扰下的GNSS弱信号检测算法
Detection of GNSS Weak Signal in Cross Correlation Interference
摘要
Abstract
GNSS receivers are required to be capable of receiving weak signals to satisfy indoor Applications. When detecting weak signals, the receiver may falsely acquire or track the cross correlation peaks of strong signals due to the cross correlation interference.Coherent and non-coherent integration are combined to improve the reception sensitivity. Meanwhile,the detection threshold is adjusted automatically by estimating the cross correlation interference power from strong signals to mitigating cross correlation interference. Simulation results show that the receiver can detect weak signal of-160dBm for 20ms coherent and ls non-coherent integration without the interference of cross correlation. As the power of cross correlation interference increases,the resultant false alarm probability is maintained below the present value by automatically increasing the detection threshold.关键词
GNSS接收机/弱信号/高灵敏度/互相关干扰Key words
GNSS receiver/weak signal/high sensitivity/cross correlation interference分类
信息技术与安全科学引用本文复制引用
何文涛,徐建华,叶甜春..互相关干扰下的GNSS弱信号检测算法[J].电子学报,2011,39(2):471-475,5.基金项目
国家863高技术研究发展计划(No.2007AA12Z344) （No.2007AA12Z344）
