This special issue arises from the spread of low-cost radar sensors and processing units which offer an extended range of applications. However, such technology is also available for inappropriate actions as terrorist attacks. Thus, the focus of this special issue is on innovative radar signal processing solutions, which exploit (possibly distributed) systems in a way that is aimed at safety and/or homeland security applications.
Edited by: Danilo Orlando, Augusto Aubry, Saeed Gazor, Guolong Cui, Chengpeng Hao and Ali Cafer Gürbüz