Advanced Technologies to Set the Tone for Wireless Communication

Published On : 11 Apr 2018

Telecommunications, also otherwise known popularly known as telecom, is the exchange or conveyance of information over substantial distances through electronic means and refers to all kinds of video, data, and voice transmission. This is a wide term that comprises a very wide range of technologies of information transmitting like radio and television broadcasting, telephones (wireless and wired), satellites, fiber optics, the internet and telegraphs, and microwave communications.

Ever since the introduction of commercial form of advanced mobile phone system (AMPS) service from the year 1983, the mobile communication systems have experienced a phenomenal growth. The most significant breakthrough has been the cellular concept which is a form of wireless communication.

LTE stands for long term evolution. LTE refers to a 4G wireless communications standard that is developed by the 3rd Generation Partnership Project (3GPP) and it has been designed so as to offer up to 10x the speeds of 3G networks for various mobile gadgets such as wireless hotspots, netbooks, smartphones, notebooks, and tablets.

LTE Technology Comes with a High Cost

It's actually the fastest and latest method to transmit data to various gadgets and phones from cellular towers. It is one of two so-called 4G or "fourth-generation," wireless technologies that have been deployed by many different phone companies.

A phone typically must work with many different wireless technologies and transmit CDMA, WCDMA, EDGE, GSM and LTE signals. Each of these technologies come with different power requirements and bandwidth. This refers to switches, power amplifiers, and bandpass filters are required before the antenna, which substantially augments the complexity of transceiver circuits comprising component design like power amplifiers (PAs). LTE and LTE-Advanced networks make a delivery of higher peak data rates that are needed from the smart phones of today’s world. However, lately LTE and LTE-Advanced comes at heat generation, significant power drain, and a cost. The requirement to make radio frequency front ends more power efficient is important for 4G LTE. 

The amplifiers’ efficiency plays a crucial role in the operation and design of an overall system. In addition to that, the processor and display, the main contributor for power consumption of a present day smartphone is the TX power amplifier. Heat generation/dissipation, system functionality, and power consumption are just a few of the design elements that are dependent on the efficiency of the amplifier, especially when it is a substantial user of power within the system.

Power amplifiers are most effective and efficient when they operate at peak output power, where the power amplifiers enter compression. When the input radio frequency signal is lower in amplitude, the power amplifier comes with less efficiency. Whilst considering a typical LTE power amplifier, it is quite possible to obtain up to 50 percent of efficiency when the gadgets operate at peak output power. However, much of the efficiency is unfortunately diminished due to LTE making usage of modulated signals with surging higher peak-to-average power ratios (PAPR). Current day modulation techniques degrade the performance of power amplifier significantly.

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