The survey of through-wall radar system

In contemporary times, optical cameras have garnered extensive usage, particularly in the realm of surveillance applications. Nevertheless, optical cameras possess certain limitations that hinder their ability to capture images efficiently in certain scenarios. For instance, they struggle to produce clear photographs in environments characterized by excessive brightness, darkness, or the use of flash. Additionally, the acquisition of high-definition portraits using optical cameras may raise ethical questions regarding potential violations of personal privacy. The detection of occluded objects by optical cameras poses a significant difficulty in the context of security applications. The topic of through-wall radar has gained significant interest due to its notable camouflage, as well as its advantageous features such as through-wall detection and resilience to optical causes. Researchers have successfully devised and developed several efficient through-wall radar systems that have shown to be helpful in several domains such as search and rescue operations, counter-terrorism efforts, medical applications, and urban warfare scenarios. This study provides an overview of prevalent through-wall radar technologies, conducts comparative evaluations, and explores the potential advancements and issues associated with this technology.