摘要
为了实现非合作导航信号的监测，研究了非合作导航信号的多普勒频率、伪码速率、伪码周期、信号功率、码序列等参数的估计。在描述全球卫星导航系统（GNSS）信号模型和GNSS监测系统体系结构的基础上，给出了GNSS信号检测与参数估计流程，提出了一套非合作导航信号盲检测与参数盲估计方法，即利用导航信号循环平稳特性估计信号频率、码速率和信号功率，再根据周期信号自相关方法估计伪码周期，最后使用滑动相关方法和数据累加方法估计信号码序列。仿真结果验证了提出方法的正确性。
To monitor non-cooperative navigation signals, the paper studies the estimation of the signals＇ parameters like Doppler frequency, symbol rate, code period, power and code structure. Based on the description of the global navigation satellite system （GNSS） model and GNSS monitoring structure, the method for blind detection of non-co- operative navigation signals and blind estimation of the above-mentioned parameters is proposed as below. The cy- clostationary characteristic of navigation signals is used to estimate the signal power, the symbol rate and the Doppler frequency. The code period is measured based on the autocorrelation function of periodic signals. The slip- page correlation method and the data accumulation method are used to decode the code structure. A simulation ex- ample illustrates the effectiveness of the approach.
出处
《高技术通讯》
CAS
CSCD
北大核心
2011年第12期1258-1263,共6页
Chinese High Technology Letters
基金
863计划（2007AA122330,2008AA122302,2009AA122328）资助项目.
关键词
信号监测
参数估计
循环平稳信号
自相关
滑动相关
signal monitoring, parameter estimation, cyclostationary signal, autocorrelation, slippage correlation
