Application of systolic tri-arrays on the Griffiths-Jim adaptive beamformer

An adaptive array system can automatically adjust its directional response to nullify interference or jamming and can therefore enhance the reception of desired signals. The most frequently employed technique for deriving the adaptive weight vector is to use the closed-loop gradient descent algorithm. Gradient descent algorithms are very effective and extremely robust. Unfortunately, in a broad dynamic range signal environment, they are not suitable for an adaptive beamformer based on the gradient descent process because of poor convergence. Recently, the application of direct solution or 'open-loop' techniques to adaptive array system processing has been developed to improve convergence. Here we attempt to perform the systolic array through computer simulations and to apply it to the Griffiths-Jim adaptive beam-former to obtain rapid convergence, high cancellation performance and real-time signal processing.