目标海拔已知的信号到达幅度比无源定位方法

发布时间：2018-05-05 04:22

本文选题：信号到达幅度比 + 无源定位　；参考：《电子学报》2016年06期

【摘要】：信号到达幅度比方法因测量简便,可实现对窄带信号的无源定位而广泛应用于射频定位系统、无线传感器网络和声源定位中.当目标海拔已知,将其作为定位方程的约束条件可实现对目标更精确的定位,而现有方法没有考虑这个问题.对此本文建立了海拔约束的信号到达幅度比无源定位模型,推导了定位精度的克拉美劳下界,并提出了一种基于Newton迭代的定位算法.理论推导表明该算法在测量误差服从方差较小的零均值高斯分布时能够达到克拉美劳下界,仿真结果与理论推导一致.无线电栅格化监测试验网的验证结果表明,对系统幅度误差进行校正后,该方法能够实现对辐射源的准确定位.
[Abstract]:Because of the simple measurement and the passive localization of narrowband signals, the method of amplitude of arrival ratio of signal is widely used in radio frequency positioning system, wireless sensor network and sound source location. When the altitude of the target is known, it can be used as the constraint condition of the positioning equation to achieve a more accurate location of the target, but the existing methods do not consider this problem. In this paper, a passive location model of the amplitude of arrival ratio of signals with altitude constraints is established, the lower bound of the location accuracy is derived, and a localization algorithm based on Newton iteration is proposed. The theoretical derivation shows that the algorithm can reach the lower bound of Clammerau when the measurement error is from the zero mean Gao Si distribution with small variance, and the simulation results are consistent with the theoretical derivation. The verification results of the radio rasterization monitoring test network show that the method can accurately locate the emitter after correcting the system amplitude error.
【作者单位】：电子科技大学电子工程学院;西南电子电信技术研究所;总参通信工程设计研究院;
【基金】：国家自然科学基金(No.61172140,No.61401069) 重庆高校创新团队建设计划(No.KJTD201343) 教育部“新世纪优秀人才支持计划”(No.NCEF-11-0873)
【分类号】：TN911.7

【相似文献】