A Sensor Gain Estimation Method Using Calibration Source

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.