Enhanced beamforming techniques for broad-band satellite applications

The adaptive beamforming techniques are an essential part of future satellite communication systems. Their use has until very recently been confined into expensive high performance military applications. Recent advances in VLSI technology and modern DSP techniques have meant that adaptive beamforming techniques can be used in lower cost, commercial applications. The authors present a novel subband adaptive beamformer (SAB) that uses quadrature mirror filter (QMF) banks to generate the subbands. The initial results point out that the QMF-SAB could be more advantageous to use in terms of convergence speed and cancellation performance over fullband adaptive beamformers (FAB)