测绘科学技术学报Issue(3)：253-256,262,5.DOI:10.3969/j.issn.1673-6338.2014.03.008
双估计跟踪偏差的理论分析
Analytical Derivation of Double Estimator Tracking Bias for BOC Signals
摘要
Abstract
The various unambiguous tracking techniques for binary offset carrier ( BOC ) modulated signals have been proposed since it has been selected in next generation global navigation satellite system ( GNSS) . Double esti-mator may become a standard method because of its satisfied performance in accuracy and robustness. This pro-posed technique is based on two-dimensional correlation, and the tracking bias in practical condition is hard to the-oretically analyze and can only be obtained by simulation. Based on the dual sideband model of BOC modulated signals, the tracking bias of double estimator is analytically derived for the first time in the paper. Theoretical anal-ysis proves that the ionosphere dispersive effect and channel imperfections would induce a considerable bias. Simu-lation is also given to support the conclusion. The conclusion has significance in BOC tracking techniques.关键词
卫星导航/BOC调制/双估计算法/双边带模型/电离层效应/通道非理想Key words
satellite navigation/BOC modulation/double estimator/dual sideband model/ionosphere effect/channel imperfections分类
天文与地球科学引用本文复制引用
曾欣,王森,朱筱虹,许昭霞..双估计跟踪偏差的理论分析[J].测绘科学技术学报,2014,(3):253-256,262,5.
