摘要
针对空中目标辐射源的定位问题,根据电磁波在空间中传输的距离与所产生损耗的关系,提出一种基于到达信号强度的多站无源定位方法。该方法假设特定频率的信号只来自于某未知的空中目标,并需要在某区域内随机分布5个以上观测点,用以同步监测特定频率的电磁波信号强度。根据监测的信号强度,利用多元线性回归的方法即可推算出未知目标的经度、纬度、高度及信号强度。信号噪声、目标运动速度、各观测点监测时间误差和观测点位置误差将降低发现目标的成功率,而观测点数量的增加可提高发现目标的成功率。定位的精度则主要受目标运动速度、观测点监测时间误差及观测点位置误差的影响,这几项因素值越小,定位误差越小。仿真结果表明,该方法适用于发现和定位低速运动的空中目标辐射源。
Focusing on the issue of emitter location of the air target, a multi-station passive location method based on the strength of the arrival signal was proposed. It was assumed that the signal of a certain frequency comes from an unknown aerial target, and it needs more than 5 observation points in a certain area. According to the signal strength, the longitude, latitude,height and signal strength of the unknown target could be calculated by using multiple linear regression method. Signal noise,target velocity, monitoring time error and observation point position error will reduce the success rate of locating, and the increase of observation points can improve the success rate of the locating. The location accuracy is mainly affected by the velocity of the target, the monitoring time error and the position error of the observation point, the smaller the values of these factors, the smaller the location error. Simulation results show that the proposed method is suitable for the detection and localization of aerial target with low velocity motion.
出处
《计算机应用》
CSCD
北大核心
2017年第A01期23-26,38,共5页
journal of Computer Applications
关键词
空中目标
辐射源定位
无源定位
多站定位
到达信号强度
多元线性回归
aerial target
emitter location
passive location
multi-station location
Strength Of Arrival （ SOA）
multiple linear regression
