The purpose of in-building wireless (IBW) systems is to provide enhanced network coverage and/or capacity when the existing macro network is not able to adequately service the high demands of current customers. This application note provides an overview of the IBW system and focuses on currently deployed architectures used to supply in-building coverage. Download the full paper for an IBW market overview, information on the Distributed Antenna System (DAS), Distributed Radio System (DRS), and the Distributed Small Cell (DSC), as well as test solutions for optimal in-building wireless performance.