Introduction
The early mobile systems (1G - 1st Generation) emerged in commercial scope in the 1980's, but it was in this last decade that the mobile communication became irreplaceable for the society. The 2G (2nd Generation) and 3G (3rd Generation) technologies are now world spread and with the prices of the phones getting cheaper it makes even easier to people to get access to these technologies.
The continuous demand for higher speed and connectivity makes necessary a continuous evolution of the communication systems. The LTE-A (Long Term Evolution Advanced) is the technology that will represent this next generation of mobile services. It is a standard developed by 3GPP (3rd Generation Partnership Project) that will improve communication performance, increasing data rate and link range without increasing transmit power or bandwidth.