针对导航卫星定位系统在室内和高楼间无法定位的难题，考虑到地面电视信号的自身优越性，文中提出利用我国正在大力发展的地面数字多媒体电视广播来辅助卫星导航信号进行混合定位。在城市环境中众多障碍物的遮挡会使多径影响严重，对此本文基于混合定位系统提出一种新型非视距误差消除算法--距离动态补偿和线性位置线联合算法。仿真结果表明，该联合算法优于传统的泰勒级数展开法，即使在非视距影响严重的恶劣环境中仍可实现可靠定位。“,”Given the advantages of digital television signals, the hybrid positioning system combining DTMB and satellite navigation signals has been introduced, in case of failure in satellite positioning alone. In this paper we take some further study on the method of NLOS error mitigation based on this system in view of a large number of obstacles in the urban environment. This novel algorithm is referred to as Range Dynamic Compensation and Linear Line of Position Joint Algorithm. The simulation testing result indicates that this joint algorithm which is superior to Taylor series algorithm can achieve reliable location even in areas with serious NLOS contamination.