5 search results - page 1 / 1 » Uplink synchronization in OFDMA spectrum-sharing systems |
TSP
2010
12 years 11 months ago
2010
Spectrum sharing employs dynamic allocation of frequency resources for a more efficient use of the radio spectrum. Despite its appealing features, this technology inevitably compli...
ICASSP
2011
IEEE
12 years 8 months ago
2011
IEEE
In Cognitive Radio (CR) systems, spectrum sensing plays a key role to determine the free frequency bands. However, when the primaryuser (PU) signal spectrum exhibits localized fad...
VTC
2006
IEEE
13 years 10 months ago
2006
IEEE
— For the uplink transmission of a coded OFDMA system, we present an iterative receiver that performs joint frequency offset acquisition, channel estimation and maximum a posteri...
WIMOB
2007
IEEE
13 years 10 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 ...
GLOBECOM
2007
IEEE
13 years 10 months ago
2007
IEEE
This paper addresses initial ranging (uplink synchronization and power control) for TDD OFDMA systems. Exploiting the channel knowledge from the downlink channel together with ini...