Diagonal loading technique can make the adaptive beam-forming keep good performance in the case of mismatch, but there is not a strict standard in the determination of the loading quantity. This paper uses a quadratic constraint to discuss diagonal loading problems.The loading level will associate with the constraint conditions of weight module,and then calculate the optimal loading quantity by iteration.This method does not need to know the specific priori information of signal, so it is more flexible and applicative. Simulation results show that optimal load has better robustness in the case...
