动目标多径回波的时延、到达角和多普勒频率联合估计  被引量:2

Joint Estimation of Time Delays, DOAs and Doppler Shifts of Reflections form Multiple Moving Targets

在线阅读下载全文

作  者:易岷[1] 魏平[1] 肖先赐[1] 

机构地区:[1]电子科技大学电子工程学院,成都610054

出  处:《信号处理》2005年第5期427-433,共7页Journal of Signal Processing

摘  要:动目标回波的时延、到达角与多普勒频率等参数,都是定位与跟踪目标所需的重要参数。本文针对动目标多径回波的参数估计问题,利用照射信号的周期重复性建立了具有旋转不变结构的阵列接收信号模型,并将PRO-ESPRIT算法应用于该信号模型,从而利用模型中的旋转不变因子及其对应的特征向量估计得到各多普勒频率、时延和到达角参数。这一方法对阵列形式没有特殊要求;与已有的联合估计方法相比,多参数联合估计时无需高维搜索或迭代,估得的对应相同回波的信号参数自动配对;在照射信号未知及存在相同多普勒频率参数的条件下,仍具适用性。计算机仿真结果证实了该方法的有效性。Time delay, DOA, and Doppler shift of reflection from the moving target, are important parameters related to the target locating and tracking. For estimation of these parameters of reflections form multiple moving targets, an array signal model which has the rotational invariance property is developed based on the repetitive characteristic of the transmitted signal. The PRO-ESPRIT algorithm is then applied to this model, and the respective Doppler shifts, time delays and DOAs are estimated from the rotational invariance factors and corresponding eigenvectors. This presented approach has no limitation on the arrays been used, needs no multidimensional optimizations or iterations, pairs estimated parameters belonging to the same reflection automatically. Furthermore, it can be used when the transmitted signal is unknown or there are reflections with equivalent Doppler shifts. The computer simulations validate the efficiency of this approach.

关 键 词:时延 到达角 多普勒频率 联合估计 目标回波 动目标 多径 ESPRIT算法 信号模型 跟踪目标 

分 类 号:TP391.41[自动化与计算机技术—计算机应用技术] TN957.51[自动化与计算机技术—计算机科学与技术]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象