The transformed domain hybrid adaptive beamformer for multiple jammers suppression

Abstract

The major area of current interest in adaptive arrays in their application to problems arising in radar, sonar, and communication systems, where the designer almost invariably faces the problem of interference suppression. In general, for real time processing, the robustness, with respect to the changed environment, of the adaptive beamforming algorithm with rapid convergence rate is desired. In this paper, a new hybrid adaptive beamforming algorithm is derived in the discrete-cosine transformed domain for multiple jammers suppression. Overall performance improvement, in terms of convergence rate and the computational requirement, 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 suppression and the rate of convergence.

<title>Performance of uniform and nonuniform subband constrained adaptive beam forming under broadband correlated arrivals</title>

“…The incoming broadband signals are first decorrelated via spatial averaging as described in [7]. The incoming broadband signals are first decorrelated via spatial averaging as described in [7].…”