Sciweavers

Share
GLOBECOM
2008
IEEE

Opportunity Detection for OFDMA Systems with Timing Misalignment

8 years 8 months ago
Opportunity Detection for OFDMA Systems with Timing Misalignment
— Accurate detection of spectrum opportunities within the frequency band of an orthogonal frequency division multiple access (OFDMA) system is a critical requirement for the realization of a coexisting cognitive radio. In this paper, we analyze the opportunity detection performances of energy detection and ESPRIT algorithms in the presence of timing misalignments in uplink (UL) OFDMA. For the energy detector, the statistics of subcarrier power are derived, and the accuracy of these derivations is verified through simulations. The feasibility of opportunity detection in an asynchronous UL-OFDMA system is proven. Also, it is shown that energy detection has a considerably better performance than the ESPRIT algorithm especially when the subcarrier assignments change frequently.
Mustafa E. Sahin, Ismail Güvenç, Moo-R
Added 29 May 2010
Updated 29 May 2010
Type Conference
Year 2008
Where GLOBECOM
Authors Mustafa E. Sahin, Ismail Güvenç, Moo-Ryong Jeong, Hüseyin Arslan
Comments (0)
books