摘要
卫星定位技术已经十分成熟并被广泛的应用于各种场景中,而对于地面数字广播信号的定位研究还处于初步阶段。本文基于中国的地面数字广播系统DTMB,利用TDS-OFDM的帧格式的特点,提出了一种可行的测距算法,利用4个发射台测得的伪距,完成最终的定位。Matlab仿真验证结果表明,此方案具有很高的可靠性,即使在信噪比较低的情况下,也能保证定位的准确性。
Compared with Global Navigation Satellite System (GNSS) which has been deeply studied and widely applied, the systems based on digital terrestrial television broadcasting (DTTB) for positioning need to be further studied. In this paper, we proposed a ranging algorithm based on DTMB by utilizing the frame structure of TDS-OFDM. The final position is achieved by using the pseudo-ranges measured by four transmitters. Meanwhile, the simulation and verification are also given based on Matlab. The simulation results prove that the proposed scheme can provide accurate positioning results even under low SNR conditions.
作者
吴轩
张超
邵会兵
张康
梁彪
WU Xuan;ZHANG Chao;SHAO Huibing;ZHANG Kang;LIANG Biao(Department of Electronic Engineering,Tsinghua University,Beijing 100084,China;Beijing Institute of Control and Electronic Technology,Beijing 100038,China)
出处
《电视技术》
2019年第4期36-39,共4页
Video Engineering
基金
国家自然科学基金创新研究群体(61321061)
国家自然科学基金资助项目(61790533)
