Performance analysis of scheduling and interference coordination policies for OFDMA networks

Fodor, Gábor; Telek, Miklós; Koutsimanis, C.

doi:10.1016/j.comnet.2008.01.006

Cited by 5 publications

(1 citation statement)

References 20 publications

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“…In OFDMA, the interference from neighboring cells are averaged by using different carrier permutations (subsets) between users located in separate cells. Since the cell edge users are highly probable to be interfered by the users in neighboring cell edge users due to using the same frequency also known as ICI [5]- [7], one of the most challenging issues for OFDMA based system is to mitigate this interference. Aside, the intra-cell interference is successfully avoided by assigning a sub-carrier no more than once and maintaining the orthogonality in a cell.…”

Section: Downlink Capacitymentioning

confidence: 99%

On the statistics of sub-carrier collisions for cell-edge users and air interface capacity in OFDMA systems

Ekin

Yarkan

Qaraqe

et al. 2011

ISSCS 2011 - International Symposium on Signals, Circuits and Systems

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In next generation wireless networks (NGWNs), interference is one of the most important considerations in terms of system design, deployment, and performance. Given the ability to use the spectrum in finer granularity such as in orthogonal frequency division multiple access (OFDMA) systems, scheduling seems to be one of the most important functionalities of NGWNs. Therefore, in this study, sub-carrier collisions for especially cell-edge users are investigated along with their impact on air interface capacity for OFDMA-based systems. It is shown that sub-carrier collisions follow hypergeometric distribution with different statistical characteristics. In addition, the air interface capacity of OFDMA systems with the availability of interference is studied as well. Numerical results are presented to verify the theoretical analysis and investigate the impacts of different parameters on both sub-carrier collisions and the air interface capacity.

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Section: Downlink Capacitymentioning

confidence: 99%