Low‐complexity robust adaptive wideband beamforming based on covariance matrix reconstruction
Yaqi Liu, Yongjun Zhao · Electronics Letters · 2018
A novel beamformer without tapped delay lines (TDLs) or sensor delay lines (SDLs) is proposed. It treats one wideband signal from a direction as multiple narrowband signals from an angular sector. To preserve the signal of interest, it reconstructs the interference‐plus‐noise covariance matrix using narrowband Capon spectral estimator. Eliminating the TDLs and SDLs leads to a simpler system and lower computational complexity. Moreover, it outperforms traditional wideband beamforming methods in the case of limited snapshots or high signal‐to‐noise ratio.