Abstract: The double-star TDOA -FDOA joint location precise is seriously influenced by altitude error. To overcome this drawback, we present a digital maps aided localization method. First, the initial localization algorithm is derived. Then, three-dimensional digital map is introduced to reduce the localization error caused by zero altitude assumption. And the theoretical location error expressions are also to be given. The simulation results illustrate the validity of our algorithm.

摘要： 针对双星时差、频差联合定位精度受高程误差影响较大问题，提出了一种数字地图辅助的定位方法。在推导出初始定位算法的基础上，引入三维数字地图以降低零高程假设导致的定位误差，并给出了该方法的定位误差的理论表达式,仿真结果表明了该方法的有效性。