TABLE OF CONTENTS The International Telecommunication Union (ITU) produced its first document in 1999 to define future global requirements for the next generation for wireless telecommunications (known as the third generation (3G)) in a document called the International Mobile Telecommunication specifications (IMT2000). The release in 1999 was then developed, as we will explain in this chapter. Furthermore, the ITU allocated the spectrum 1885 2025 MHz for the reverse link channels, including the satellite component band 1980 2010 MHz in the new system. The band allocated for the forward link channels in the new system was 2110 2200 MHz, including the satellite component band 2170 2200 MHz.
The most important 3G technology compatible with IMT2000 standards was the wideband direct sequence spread spectrum CDMA, which was developed by an International Industrial Consortium and known as 3GPP (Third Generation Partner Project), details of the 3GPP specifications mentioned in this chapter are located at the end of the chapter). The 3G wideband CDMA will be presented in Section 8.8. The other important system developed by another International Industrial Consortium known as the 3GPP2 was the cdma2000. We will focus in this section on the cdma2000 as an evolution of IS-95 to 3G systems.
In the US, most of the spectrum allocated by the ITU for use by the IMT2000 was already allocated to the 2G systems at the time. The total 3G spectrum allocation was 230 MHz. The World Radio Communication Conference 2000 (WRC2000), considering the tremendous future growth in...
