To calibrate the array errors with gain and phase uncertainty for distributed HFSWR

a calibration approach for evaluating the gain-phase errors is presented in this paper.Using the known position direct wave signal’s Doppler spectrum to estimate the array gain-phase errors

it is no use to estimate the covariance matrix and eigendecomposition.Compared with the channel calibration using sea echoes with single DOA

the method has a small amount of computation and it is easy to be implemented.Comparative validation analysis of simulation and measured data show that the direct wave calibrate array calibration of gain and phase errors can get a stable amplitude

phase calibration value

MUSIC spectral estimation of calibration accuracy and stability are significantly improved.