摘要
着重研究了针对均匀线阵中由各阵元幅度相位不一致性及位置误差的综合影响引起的阵列流形误差的校正问题。该方法利用单信号源 (可以为事先设置的校正源或某目标源 ) ,无须准确知道信号源的波达方向 ,只须在校正过程中将阵列天线以已知角度旋转两次 ,即可对各阵元的幅度、相位及位置因子作较精确的估计 ,从而估计出综合误差存在情况下的阵列流形 ,并可同时估计信号源的波达方向。该方法无需迭代 ,计算简单快速 ,且具有较高的估计精度。
The performance of high resolution algorithms seriously degenerates when there are errors in array manifold. This paper presents a problem of linear equi spaced (LES) array calibration in the presence of errors in the array manifold that result from the combined effect of sensor gain, phase and position uncertainties. By using a single signal source (a calibration source or an object signal) without exact knowledge of its direction of arrival (DOA) and rotating the sensor array twice, this method can precisely estimate the sensor gain, phase and position factors, and the array manifold in the presence of combined errors. Simultaneously, the DOA of the signal source can be estimated. Because the method is not an iterative method and spectral peak search is not required. Moreover, it can produce a high estimation precision. Simulational and experimental results show that the method is effective.
出处
《数据采集与处理》
CSCD
2003年第4期383-388,共6页
Journal of Data Acquisition and Processing
基金
安徽省自然科学基金 ( 0 0 0 43 2 0 9)资助项目
关键词
均匀线阵
幅相
位置误差
快速校正方法
阵列信号处理
linear equi spaced array
array manifold
error calibration
multiple signal classification (MUSIC) method
