宽带信号目标参数估计精度分析  

Parameters Estimation of Targets with Wideband Signal

作　　者：曹宇飞[1] 屈晓光[1] 黄培康[1] 

机构地区：[1]中国航天科工集团二院二十三所,北京100854

出　　处：《现代防御技术》2010年第1期64-67,80,共5页Modern Defence Technology

摘　　要：现代雷达中随着信号带宽的增大和目标速度的提高,常规窄带近似的条件无法满足需要。根据匹配滤波和宽带模糊函数的特点,推导了目标回波延时和尺度因子的理论估计精度。通过仿真证明,推导的尺度因子估计的理论精度与相关文献一致,而新得到的延时估计理论精度基本不随载频变化,更符合实际应用。When signal bandwidth and the speed of moving objects increase, the narrowband signal model is not suitable anymore in modern radars Based on matched filter and wideband ambiguity function, the theoretical accuracy of target parameter estimation is derived and the estimation error variance of time delay and Doppler stretch are presented. Simulation results show that the derived theoretical accuracy of variance of time delay keeps stable as carrier frequency varies, which is more practical.

关 键 词：参数估计 宽带模糊函数 回波延时 多普勒尺度因子 

分 类 号：TN958[电子电信—信号与信息处理] TN957.51[电子电信—信息与通信工程]