因GPS技术在楼群密集的城市不能单独完成定位,文中采用GPS/DTMB组合导航新方案,又针对传统二维机动模型的不足,研究三维下的平面变速转弯模型,并作为运动目标的机动模型,同时仿真对比分析不同粒子数目下的粒子滤波算法(PF)跟踪效果,结果表明,200个粒子的误差均值为4.5906m,400个粒子误差均值为2.3776m,滤波后的轨迹与真实轨迹基本重合,定位跟踪效果好,且粒子数目越多,误差均值、标准差、方差越小,即定位跟踪精度越高。证明了GPS/DTMB组合导航新方案的可行性。

In order to overcome deficiency of location functional limitation of GPS in dense building urban areas, this paper adopts the new GPS/DTMB integrated navigation scheme, in view of the shortcomings of traditional two-dimensional dynamic modelthis paperthe planar variable-turn model under dimensional model, which is used as moving target maneuvering model, also, simulation the tracking effect under different particle numbers of 200 and 400 of particle filter(PF) algorithm, theoretical analysis and simulation results show that mean error of 200 particles is about 4.590 6 m, 400 particles is about 2.377 6 m, the filtering trajectory is consistent with the real trajectory basically, which has good location tracking effect, and the more particle numbers, the smaller mean error, standard deviation, variance, the smaller the error of the mean, standard deviation, variance, this means that location tracking precision is higher. These proved the feasibility of GPS/DTMB integrated navigation.