Appendix C: Spectrum Tables—Wireless Broadband
Vern Fotheringham, Chetan Sharma · 2008
The majority of the spectra allocated for mobile wireless services have been organized in paired blocks of spectrum for separate radio pathways for both transmit and receive requirements.Thus, the migration of the legacy cellular networks and most new UMTS spectrum licenses to next-generation OFDMAbased LTE technology will be accomplished using FDD techniques.The spectrum that is coming into service under the Mobile WiMAX platforms is typically targeted for implementation using unpaired single blocks of spectrum that allow both transmit and receive signals to travel over the same radio frequencies.The use of TDD techniques allows two-way mobile communications over these unpaired spectrum blocks that were traditionally allocated for broadcasting services.The following table details the majority of the spectrum allocations that are presently under consideration for conversion to next-generation OFDMA-based services.Not included are the original 800 MHz allocations for analog AMPS cellular in the United States.Most have been converted to either TDMA or CDMA digital technology, but it is highly likely that these bands will also eventually be considered for a migration to OFDMA technology by the existing holders of these legacy licenses.