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基于OFDM信号的无线电定位系统研究
引用本文:刘海颖,叶伟松,冯成涛. 基于OFDM信号的无线电定位系统研究[J]. 无线电工程, 2010, 40(3): 30-32,54
作者姓名:刘海颖  叶伟松  冯成涛
作者单位:南京航空航天大学,高新技术研究院,江苏,南京,210016
基金项目:教育部博士点基金项目,南京航空航天大学引进人才基金 
摘    要:针对NLOS(非视距)环境下高精度定位,给出了基于OFDM(正交频分复用)信号的无线电定位方法,利用现有的并非专门为定位设计的无线电信号进行定位。建立了OFDM无线电定位模型,分析了OFDM信号结构,给出了基于TDOA(波达时间差)定位方法。采用特征相关法进行符号边界、采样序列和符号序列偏移计算,通过仿真验证了本文方法的有效性,尤其是均值特征相关法在信噪比为-5dB时也可获得精确的TDOA测量。

关 键 词:无线电定位  非视距  正交频分复用  波达时间

Research on Positioning Based on Orthogonal Frequency Division Multiplexing Signals
LIU Hai-ying,YE Wei-song,FENG Cheng-tao. Research on Positioning Based on Orthogonal Frequency Division Multiplexing Signals[J]. Radio Engineering of China, 2010, 40(3): 30-32,54
Authors:LIU Hai-ying  YE Wei-song  FENG Cheng-tao
Affiliation:LIU Hai-ying,YE Wei-song,FENG Cheng-tao (Academy of Frontier Science,Nanjing University of Aeronautics , Astronautics,Nanjing Jiangsu 210016,China)
Abstract:In order to achieve the high precision positioning in NLOS situation,the radiometric positioning method based on OFDM signals was presented,which uses the exiting radio frequency signals that were not intended for positioning to realize positioning.The radiometric positioning model using OFDM was established.The OFDM signals structures were analyzed.The TDOA(Time Difference of Arrival) positioning method was given.The symbol boundaries,sampling index and symbol index shift were calculated using feature corr...
Keywords:radiometric positioning  NLOS  OFDM  TDOA  
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