Abstract:

In the airborne radar system, the parameter estimation and geolocation accuracy of moving targets will be affected by array error. To deal with this problem, a array error estimation method based on Frobenious norm fitting of clutter data is proposed. Firstly, the clutter spacetime steering matrix is computed by using the knowledge of clutter distribution and radar geometry parameters. Then, the truncated singular value decomposition method is utilized to estimate the clutter amplitude vector and reconstruct the clutter data. Finally, array error is estimated by minimizing the distance induced by the Frobenious norm between the received data and the reconstructed data. Numerical simulation results validate that the method can achieve a fine parameter estimation accuracy and provide robustness when the number of snapshots or pulses is limited.