通道增益的有源估计方法

A Sensor Gain Estimation Method Using Calibration Source

在DOA估计中解决通道不一致性问题的关键是设法求得各通道的复增益。本文利用在天线阵列所在平面设置的一个校正源 ,运用信号子空间对信号DOA和通道增益的约束关系对通道增益进行估计 ,在未知校正信号DOA时可通过迭代的方法获得二者的一致估计。

Estimating of sensor gain is important for the calibration of channel mismatch in the DOA estimation. The method presented by this paper needs setting a calibration source in array plane at first. Then using the constrain of DOA angles and sensor gain in the signal subspace , the estimation of sensor gain can be obtained. When the DOA of the calibration source is unknown, the consistent estimation of them can be get by iterative method. The usefulness of this estimation method is demonstrated through simulations.