非视距环境下DTMB辅助北斗定位系统算法研究  

Research on DTMB-assisted Beidou Positioning System Algorithm in Non-line-of-sight Environment

作　　者：彭鸿钊 吴虹[1] 杨梦焕 乔红玉 李世琛 杨海效 Peng Hongzhao;Wu Hong;Yang Menghuan;Qiao Hongyu;Li Shichen;Yang Haixiao(Engineering Research Center of Thin Film Optoelectronics Technology,Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300350,China)

机构地区：[1]南开大学电子信息与光学工程学院,天津市光电传感器与传感网络技术重点实验室,光电子技术教育部工程研究中心,天津300350

出　　处：《南开大学学报（自然科学版）》2022年第5期72-77,共6页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：国家自然科学基金(61571244,61871239);天津市科技计划项目(18YFZCGX00480)。

摘　　要：采取DTMB系统辅助北斗定位系统进行定位,并针对联合定位系统提出一种改进的Chan定位算法,该算法通过引入距离修正因子,利用梯度下降法逐步抑制非视距误差对测量伪距的影响.相较于传统定位算法,在非视距误差模型未知的情况下,依然能够有效缓解非视距误差对定位结果的影响.即便待测点处于移动状态,依旧能将定位误差控制在较小的范围内.In a densely populated urban environment,due to the occlusion of the building,the number of satellites is insufficient or the geometric configuration is poor,which makes it impossible to locate or the positioning accuracy is not high.In order to solve this problem,the DTMB system was used to assist the Beidou positioning system for positioning,and an improved Chan positioning algorithm was proposed for the joint positioning system.A distance correction factor was introduced in this algorithm and a gradient descent method was used to gradually suppress the non-line-of-sight error on the measurement.Compared with traditional positioning algorithms,when the non-line-of-sight error model is unknown,the algorithm can still effectively mitigate the effect of non-line-of-sight errors on positioning results.Even if the point to be measured is in a moving state,the algorithm can still control the positioning error to a small range,and it is a very effective positioning algorithm suitable for the needs of the system.

关 键 词：北斗 DTMB 非视距传播 TDOA 无线定位 

分 类 号：TN92[电子电信—通信与信息系统]