【24h】

Direct Position Estimation Approach:How Good Can it Get?

机译:直接位置估计方法:它能获得多好?

获取原文
获取原文并翻译 | 示例

摘要

In this paper we compare two alternative positioning approaches One is the so-called conventional two-steps approach,where the receiver computes a position after estimating the relative distance to a set of visible satellites,i.e.,after synchroniza- tion.The other approach is termed Direct Position Estimation (DPE)approach and proposes to estimate,directly from the received RF/IF signal,the motion parameters of the receiver. The latter was seen to provide the receiver with appealing en- hanced capabilities in scenarios of severe multipath or satel- lite blockages.First,the paper enumerates some drawbacks of a two-steps approach,as a motivation for DPE.Then,both signal models are presented,discussed and explained.De- pending on the model considered,the resulting estimator will follow one of the two possible positioning alternatives.In Proposition 1 we will see a mathematical justification to claim that DPE outperforms a conventional two-steps approach,in the Mean Squared Error(MSE)sense.Finally,a discussion on existent accuracy bounds for unbiased estimators is given and some simulation results confirming previous discussion.
机译:在本文中,我们比较了两种替代定位方法,一种是所谓的常规两步法,即接收机在估计到一组可见卫星的相对距离后,即在同步之后,计算位置。另一种方法是称为直接位置估计(DPE)的方法,建议直接从接收到的RF / IF信号估计接收器的运动参数。后者被认为在严重的多径或卫星阻塞情况下为接收机提供了引人注目的增强功能。首先,本文列举了两步法的一些缺点,这是DPE的动机。提出,讨论和解释。根据所考虑的模型,最终的估算器将遵循两种可能的定位方法之一。在命题1中,我们将看到一种数学依据,声称DPE优于传统的两步法。最后,给出了无偏估计量存在的精度范围的讨论,一些仿真结果证实了先前的讨论。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号