Oversampled receive array calibration

The problem of receive antenna array calibration in cases where the array is strongly spatially "over-sampled" is addressed in this paper. We suggest a new technique wherein spatially distributed strong clutter returns can be used for calibration with the goal of minimizing the power at the output of a number of antenna finger-beams steered into the invisible domain. The calibration algorithm is analyzed using simulation results and real over-the-horizon radar (OTHR) data to illustrate the effectiveness of the proposed technique.