| 基于数字电视无线广播信号的定位模型和系统 |
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| 引用本文： | 何峰,吴乐南.基于数字电视无线广播信号的定位模型和系统[J].东南大学学报(自然科学版),2006,36(5):690-694. |
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| 作者姓名： | 何峰 吴乐南 |
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| 作者单位： | 东南大学信息科学与工程学院,南京,210096 |
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| 摘 要： | 分析了使用数字电视(DTV)无线广播信号定位系统的必要性与可行性.提出了基于帧同步的DTV定位原理.分析了DTV定位测距特性,即在一个历元异步顺序得到多个测距观测值.推导了相关伪距观测模型和载波多普勒积分模型,在此基础上给出了DTV定位模型,包括观测方程和状态方程.仿真结果表明,DTV定位技术能够显著提高独立定位或组合导航系统定位精度.DTV定位是一种具备亚米级测距误差和米级定位精度,可成为传统卫星定位有益补充或替代的定位技术.
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| 关 键 词： | 定位 数字电视 帧同步 组合导航 广播 |
| 文章编号： | 1001-0505（2006）05-0690-05 |
| 收稿时间： | 02 27 2006 12:00AM |
| 修稿时间： | 2006-02-27 |
Positioning models and systems based on DTV broadcasting signals |
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| He Feng,Wu Lenan.Positioning models and systems based on DTV broadcasting signals[J].Journal of Southeast University(Natural Science Edition),2006,36(5):690-694. |
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| Authors: | He Feng Wu Lenan |
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| Institution: | School of information Science and Engineering, Southeast University, Nanjing 210096, China |
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| Abstract: | The necessity and the feasibility of the positioning system using digital television(DTV) broadcasting signals are analyzed.The principle of DTV positioning based on frame synchronization is brought forward and the ranging characteristic is analyzed that the observables are asynchronously measured during the same epoch interval.The models of the pseudo-range observation and Doppler carrier phase integral are studied.The system observation and state equations are presented based on the above models.Finally the simulation results show that DTV positioning technology can remarkably improve the precision of system state estimates using smoothing methods for single positioning systems or integrated navigation systems.DTV positioning having sub-meter level ranging error and meter level localization accuracy can compare with traditional positioning technology. |
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| Keywords: | positioning DTV frame synchronization integrated navigation broadcasting |
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