摘要
使用现代谱估计技术进行罗兰C接收机的天波延迟估计,有效地解决了常规接收机基准点固定的问题。文章提出的方法,在不断变化的天波干扰环境下根据数据调节相应的采样点,在低信噪比条件下分离出了地波和天波的到达时刻,且具有较高的分辨率。本文对基于参数建模和特征值分解的算法进行了讨论,充分说明了现代谱估计技术能减少对准基准点的时间,可提高现有罗兰C接收机的性能。
This paper uses spectrum analysis technique for estimating the Loran -C skywave delays. The technique can effectively solve the problem which common Loran - C receiver employs a fixed datum - mark. We design a new method. It can adjust the datum- mark automatically to optimal position according to the varying delays of skywave in real -time,and get the arrival time of groundwave and skywave separately in poor SNR. This paper discusses the parameter modelingand Eigen - decomposition algorithm. This technique decrease time to track the datum mark. It can improve the performance of Loran-C receiver enormously.
出处
《现代电子技术》
2007年第23期36-37,44,共3页
Modern Electronics Technique
关键词
频谱分析
天波延迟
特征值分解
参数建模
spectrum analysis
skywave delay
Eigen - decomposition
parameter modeling
