Broadband Beamforming Literature Survey Multidimensional Digital Signal Processing

Broadband wireless channels, where high data rates are transmitted, are extremely dispersive in nature. A fundamental challenge in the design of equalizers for the broadband case lies in reducing complexity. Broadband finite impulse response (FIR) beamformers employ a space-time antenna array which reduces the multipath delay spread to narrowband levels. Adaptive frequency-domain equalizers that exhibit relatively low complexity growth with increase in channel memory have also been considered to address this issue. This survey studies practical equalizer structures that have been proposed in the literature to combat multipath dispersion in broadband channels.