Beyond 3G Wideband wireless data access based on OFDM and dynamic packet assignment.pdf

MULTIPLE ACCESS FOR
BROADBAND WORKS
Beyond 3G: Wideband Wireless
Data Access Based on
OFDM and Dynamic Packet Assignment
Justin Chuang and Nelson Sollenberger, AT&T Labs-Research
ABSTRACT sion capabilities, increasingly demanding
applications and user expectations have emerged.
The rapid growth of wireless voice sub- Experience with puters and personal
scribers, the growth of the , and the digital assistants (PDAs) has shown that many
increasing use of puting devices end users desire their portable equipment to pro-
suggest that wireless access will rise vide essentially the same environment and appli-
rapidly over the next few years. Rapid progress cations they enjoy at their desks with few
in digital and RF technology is making promises. Experience with wireless access has
pact and integrated terminal devices, demonstrated the singular importance of
and the introduction of sophisticated wireless widespread coverage and anywhere/anytime
data software is making wireless access access. Wireless packet data access in macrocellu-
more user-friendly and providing more value. lar environments at peak rates beyond 2 Mb/s is
Transmission rates are currently only about 10 likely to be needed in the near future to provide
kb/s for large cell systems. Third-generation users with an application environment with few
wireless access such as WCDMA and t