Strict electromagnetic regulations require verification of emissions compliance of all wireless products. As a result, harmonic measurement has become increasingly important especially as modern wireless communication systems strive to achieve an optimal balance between spectrum efficiency and DC power use.
Picture one of the nation’s largest football stadiums packed with more than 100,000 people, each equipped with his or her own mobile phone. Wireless service providers typically rely on the stadium’s distributed antenna system (DAS) to maximize coverage inside of buildings. Unfortunately, the high-density of a stadium makes it challenging to service the simultaneous mobile connections while maintaining a high-quality signal. After each major event, it’s not uncommon for carriers to receive reports of performance issues that need optimization before the next game.
With the proliferation of smartphones, smartwatches and tablets in our society, instant and unhindered
access to communication, information, entertainment has become an expectation in our daily lives.
Emerging radio technologies will push download speeds into the Gigabit per second range and latencies
into single-digit milliseconds, but supporting these capabilities ultimately leads to highly complex radio
architectures. In order to address these market pressures, the MIPI RF Front-End Control Working group
was formed to define a highly efficient but flexible control interface for RF front-end devices. MIPI-RFFE
is an open standard being adopted industry wide to address current and future control and monitoring
of modern wireless RF front-ends.
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).