In recent years, the electronics industry has experienced an explosion in the growth of embedded sensors being used in high-volume applications such as smartphones, wearables, automobiles, and the Internet of Things (IoT). This rapid growth is fueled by the development of a wide variety of small-sized, low-cost sensors being married to an ever-expanding array of innovative consumer applications. An excellent example is today’s typical smartphone, which incorporates 10 or more sensors measuring anything from light and biometric responses to motion and environmental conditions.
Every generation of mobile network brings about new technology and infrastructure improvements to support faster data rates, greater bandwidth, and improved efficiency and coverage. To keep up with these advancements, base station architectures have steadily evolved over time. The introduction of fourth generation cellular (4G) required major changes in the traditional analog radio architecture, such as the migration of all analog circuitry to the remote radio unit (RRU).