Real-world RF in cell-based mobile communications

Cell-based mobile communications are fast becoming the most accessible-and preferred-mode of personal and business communication all over the world. Commercial change in this dynamic sector is causing a significant shift in the responsibilities and focus of many of its key players. With ARPU levels under strain, the modern carrier is shifting its primary focus to expanding market share and reducing capex and opex, rather than issues of network technology and performance. As a direct result, OEMs now shoulder the network technology and performance issues–today’s OEM are responsible for providing network capacity, along with minimizing expenditure and maximizing network performance.

In turn, a new breed of sub-system technology supplier is required. In the RF technology area, the mobile sector demands specialist groups that are capable of shouldering total responsibility for the RF chain.

This ‘responsibilities shift’ is set within an increasingly challenging RF and network environment: one of fast-changing network management strategies, increased demand for advanced network optimization and base station site sharing solutions, high-speed data services with low bit error rate tolerances, and intensely congested spectral and base station scenarios.

SEI provides a uniquely complete mobile system RF solution set–one founded on a truly end-to-end view of the entire RF sub-system. The solution set comprises all elements–both passive and active–along the RF chain. These include base station antennas, antenna tilt and azimuth beam control solutions (including remote control systems), control and communications software, RF amplifier and booster systems, feeder systems and RF filtering/interference abatement technologies.

SEI provides also RF repeaters that amplify the radio frequency used for mobile phone communication. Mobile phone users may experience poor mobile call quality due to construction materials, natural or manmade obstacles, or the landscape. The repeaters can enhance mobile signal coverage by amplifying both uplink signals from a donor antenna and downlink signal from a service antenna, therefore giving you access to high quality voice or data calls.