Abstract:

The channel error presented in radar will affect clutter suppression and decline the parameter estimation accuracy as well. To deal with these problems, an estimation method of the channel phase error is proposed for the airborne radar working at scanning mode. First, the clutter of different channels is dealt with the interferometric technique, after which the channel errors are estimated with the known scan angles. To reduce the influence of noise and enhance the estimation accuracy, the independent and identically distributed range cells in mainlobe clutter should be selected as estimation samples. Additionally, taking the average of clutter over multiple wave positions can further decrease the estimation error. Processing results with measured data validate that the proposed method can compensate the channel phase error very well and enhance the ability of moving target relocation significantly.