Radar networks: A review of features and challenges.

• Features and challenges of radar networks reviewed from the perspective of signal processing. • Different applications discussed. • Extensive literature covered with state-of-the-art methods categorized. • In each category, existing methods discussed and compared. • Important practical issues highlighted. Networks of multiple radars are typically used for improving the coverage and tracking accuracy. Recently, such networks have facilitated deployment of commercial radars for civilian applications such as healthcare, gesture recognition, home security, and autonomous automobiles. They exploit advanced signal processing techniques together with efficient data fusion methods in order to yield high performance of event detection and tracking. This paper reviews outstanding features of radar networks, their challenges, and their state-of-the-art solutions from the perspective of signal processing. Each discussed subject can be evolved as a hot research topic. [ABSTRACT FROM AUTHOR]