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本文研究了基于双圈圆阵的二维DOA估计系统中通道复增益的估计问题.通过将阵列分割成子阵的 办法,将问题转化为线阵系统中信号方向角和通道增益的联合估计问题.运用信号子空间对信号DOA和通道增益的 约束关系,在无校准源时,可以得到通道增益的估计.
In this paper, we study the estimation of complex channel gain in two-dimensional DOA estimation system based on double circular arrays. By dividing the array into sub-arrays, the problem is transformed into the joint estimation of signal direction angle and channel gain in a linear array system. The signal subspace constraint on the signal DOA and channel gain can be used to estimate channel gain without calibration source.