27 search results - page 1 / 6 » An Analysis on Uplink OFDMA Optimality |
VTC
2006
IEEE
14 years 4 months ago
2006
IEEE
Motivated by the increasing popularity of OFDMA, this paper studies the sum-rate optimality of OFDMA as an uplink multicarrier multiple-access scheme. We address the relationship ...
WIMOB
2007
IEEE
14 years 5 months ago
2007
IEEE
As part of the IEEE 802.16 protocol, the random access scheme is used for ranging. The ratio between the numbers of periodic ranging slots and data slots in the uplink subframe de...
WD
2010
13 years 5 months ago
2010
Abstract--OFDMA based cellular radio networks aim to operate as close as possible to frequency reuse distance of one, where the whole spectrum would be available in every cell. Mod...
GLOBECOM
2007
IEEE
14 years 5 months ago
2007
IEEE
Abstract— A distributed medium access control (MAC) algorithm for uplink OFDMA networks under the IEEE 802.16 framework is proposed and analyzed in this work. We present a simple...
WIMOB
2007
IEEE
14 years 5 months ago
2007
IEEE
In this paper, ranging process in IEEE 802.16e OFDMA systems is analyzed and performance is evaluated. Ranging process provides initial network entry, uplink synchronization, and ...