THE TRANSFORMED DOMAIN HYBRID ADAPTIVE BEAMFORMER FOR MULTIPLE JAMMERS SUPPRESSION

The major area of current interest in adaptive arrays in their applica tion to problems arising in radar, sonar, and communication systems, w here the designer almost invariably faces the problem of interference suppression. In general, for real time processing, the robustness, wit h respect to the changed environment, of the adaptive beamforming algo rithm with rapid convergence rate is desired. In this paper, a new hyb rid adaptive beamforming algorithm is derived in the discrete-cosine t ransformed domain for multiple jammers suppression. Overall performanc e improvement, in terms of convergence rate and the computational requ irement, is addressed. From computer simulation results, it was found that the presented method outperformed the conventional Frost's linear constraints LMS algorithm, in terms of the capability of jammers supp ression and the rate of convergence.