Performance analysis of a two-element linearly constrained minimum variance beamformer with sensor delay-line processing

The bandwidth performance of a two-element linearly constrained minimum variance beamformer with sensor delay-lines (SDLs) attached is studied in terms of the directions of the interference signals, the inter-spacing between delay-line sensors and the length of the SDL. Compared with broadband beamformers with tapped delay-lines (TDLs), the SDL-based structure performs better in two ways: its output SINR drops less as the inter-delay within delay- lines increases and with the same number of delays and weights it can achieve a better performance than the TDL one.