数字调频广播定位方法探讨  

Discussion on positioning method with digital FM broadcasting signals

作　　者：陈长远 蒋理兴[1,2] 韩晋山 邢建平 

机构地区：[1]信息工程大学导航与空天目标工程学院 [2]北斗导航应用技术河南省协同创新中心 [3]61191部队 [4]61175部队

出　　处：《导航定位学报》2017年第3期33-37,共5页Journal of Navigation and Positioning

摘　　要：针对卫星定位信号易受遮挡和干扰等因素影响,导致定位误差较大的问题,提出一种利用数字音频广播信号定位方法:首先分析调频频段数字音频广播的信号帧结构,研究定位参量的提取方法,发现无线子帧的信标符号是一种由伪随机序列生成的独立调制的OFDM符号,结构简单且适用于伪码测距;进一步分析包含接收机钟差和观测噪声的伪距模型,利用多站平面测距定位法实现定位。实验结果表明,定位精度可达10m以内。Aiming at the problem that the satellite positioning signals are vulnerable to occlusion and interference,which leads to the large localization error,the paper proposed a positioning method using digital FM broadcasting signals：firstly,by analyzing the signal frame structure of the digital FM broadcasting and the extraction method of positioning parameters,it was found that the beacon of the radio subframe was a kind of OFDM symbol which is generated by the pseudo-random sequence,and the beacon had a simple structure and was suitable for pseudo-ranging;moreover,the pseudorange model containing the receiver clock error and the observation noise was established,and finally the positioning was realized with multi-station planar ranging method.Experimental result showed that the positioning accuracy could be within 10 meters.

关 键 词：数字调频广播 信号帧结构 信标符号 伪距模型 定位 

分 类 号：TN966.4[电子电信—信号与信息处理]