利用两次最大似然估计的单站外辐射源时差定位算法
发布时间：2019-08-08 18:04
【摘要】：针对多站外辐射源定位系统复杂度高问题,提出了一种单站外辐射时差(TDOA)定位算法。该算法利用两次最大似然估计算法分步解相关得到目标的精确位置。仿真结果表明,时差误差较小时,估计的均方误差(MSE)接近CRLB,随着目标远离观测站,定位误差随之增大,目标距离地面的高度越低,z轴的估计误差越大。该方法利用单站接收目标的多个信号时差信息进行定位,能够克服多站定位中时间同步困难等问题。
[Abstract]:In order to solve the problem of high complexity of multi-station external radiation source positioning system, a single station external radiation time difference (TDOA) location algorithm is proposed. In this algorithm, the exact position of the target is obtained by solving the correlation step by using the twice maximum likelihood estimation algorithm. The simulation results show that when the time difference error is small, the estimated mean square error (MSE) is close to CRLB,. With the target away from the observation station, the positioning error increases. The lower the height of the target from the ground, the greater the estimation error of z axis. This method uses multiple signal time difference information of a single station to receive a target to locate, which can overcome the difficulty of time synchronization in multi-station positioning.
【作者单位】： 郑州升达经贸管理学院;洛阳电子装备试验中心;
【基金】：国家自然科学青年基金项目资助(61401469)
【分类号】：TN95
，
本文编号：2524516
[Abstract]:In order to solve the problem of high complexity of multi-station external radiation source positioning system, a single station external radiation time difference (TDOA) location algorithm is proposed. In this algorithm, the exact position of the target is obtained by solving the correlation step by using the twice maximum likelihood estimation algorithm. The simulation results show that when the time difference error is small, the estimated mean square error (MSE) is close to CRLB,. With the target away from the observation station, the positioning error increases. The lower the height of the target from the ground, the greater the estimation error of z axis. This method uses multiple signal time difference information of a single station to receive a target to locate, which can overcome the difficulty of time synchronization in multi-station positioning.
【作者单位】： 郑州升达经贸管理学院;洛阳电子装备试验中心;
【基金】：国家自然科学青年基金项目资助(61401469)
【分类号】：TN95
，
本文编号：2524516
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